Impact of Reflective Writing and Labatorials on Student Understanding of Force and Motion in Introductory Physics

In this paper, we examine a way to deal with alternative student conceptions about force and motion in a university level introductory physics course. The course combines Reflective Writing, an activity that engages students in textual material metacognitively, and Labatorials, an in-class active learning intervention. Semi-structured interviews and student writing provide evidence of conceptual change.


Introduction
A general consensus exists among physics education researchers that changing students' views about force and motion is exceedingly difficult (Chi, 2013;McDermott & Redish, 1999, and references therein).The nature and scope of the problem is described by Vosniadou (2008) and has led to a number of relatively sophisticated interventions (e.g., Kalman & Rohar, 2010;Lattery, 2017).
Students enter the physics classroom with an intuitive understanding of force and motion based on everyday experiences that can interfere with formal instruction.From infancy, students have experimented with solid bodies.Consider a child pushing a toy truck across a carpet.The child must apply constant pressure to sustain the toy truck with uniform speed.In the child's mind, only this force is required to explain the motion of the truck.Force is therefore closely discipline and different views about what counts as good science; and that these differences arise because of changes in the list of problems that a theory must resolve and a corresponding change in the standards for the admissibility of proposed solutions." For example, Newton's theory was initially widely rejected because it did not adequately explain the attractive forces between particles of matter, something required of any theory of mechanics from the perspective of the proponents of Aristotle and Descartes' theories (Kuhn, 1970: p. 148).According to Kuhn, with the acceptance of Newton's theory, this question was banished from science as illegitimate, only to re-emerge with the solution offered by general relativity.He concluded that scientific revolutions alter the very definition of science itself.
Kuhn believed that a mature science experiences alternating phases of normal science and revolutions.He emphasized the difference between normal science that does not change the key theories, instruments, values and existing concepts; (e.g., the discovery of Boyle's law left the concepts of gas, pressure and volume and the instruments used to measure them unchanged) from revolutionary discoveries in which revise the disciplinary matrix to permit the solution of the more serious anomalous puzzles that disturbed the preceding period of normal science (e.g., the discovery of Newton's theory) (Kuhn, 1987(Kuhn, /2000)).Such developments require replacing existing concepts with new concepts that are incompatible with the older ideas.
Paul Feyerabend (1962) initially introduced the term "incommensurable" and illustrated the incommensurability of scientific theories with a comparison of six pairs of central concepts drawn from three episodes of fundamental theory change in the course of scientific advance.One of these is the dynamical characterization of impetus in the impetus theory of motion and the concept of momentum in the conceptual apparatus of Newtonian mechanics (Oberheim & Hoyningen-Huene, 2009).Chi (2013) notes that: " [T] here are numerous false beliefs about concepts such as force-and-motion or heat-and-temperature across a variety of domains for which conceptual change is very hard to achieve.The robustness of such misconceptions has been demonstrated in literally thousands of studies, about all kinds of science concepts and phenomena, beginning with a book by Novak (1977) and a review by Driver and Easley (1978) both published over three decades ago.By 2008, there were over 8,000 publications describing students' incorrect ideas and instructional attempts to change them (Confrey, 1990;Driver, Rushworth, Squires, & Wood-Robinson, 1994;Duit, 2009;Ram, Nersessian, & Keil, 1997), indicating that conceptual understanding in the presence of misconceptions remains a challenging problem."(p.56).

And later:
"In short, there are many concepts like force and motion, for which one's initial flawed mental model is not transformed to the correct model despite repeated corrections or patchings of the underlying rules… the revised rules did not transform the flawed mental model into the correct model, because the implicit underlying core hypotheses were still incorrect from a dimension perspective."(p.63).

Pedagogical Approaches
The following subsections table provides a brief introduction to each of the pedagogical approaches used in this research.

Pedagogical Tool: Reflective Writing (RW)
Reflective Writing (Kalman, 2011) is a metacognitive activity, which has students examine textual material, before coming to the classroom in the manner of a hermeneutic circle (Gadamer, 1975(Gadamer, /1960)).The hermeneutic approach starts by having students initiate a self-dialogue about each textual extract.Within the framework of such a dialogue, there exist two "horizons."There is the horizon that contains everything that a student believes from the particular vantage point of encountering the textual extract.The second horizon encompasses the potential in the textual extract; the sense in which the words, in the textual extract, are related with in the language game understood by the author of the textbook.The student approaches the textual extract with preconceptions (misconceptions) about the material within the textual extract.The key quintessential experience occurs when the student is pulled up short by the textual extract."Either it does not yield any meaning or its meaning is not compatible with what we had expected" (Gadamer, 1975(Gadamer, /1960: p. 237): p. 237).At this point the dialogue begins.The student questions what is known within the entire horizon (Kalman, 2011: p. 163).

Pedagogical Tool: Labatorials (Lbt)
Labatorials were developed by the Physics Education Development group at the University of Calgary (Sobhanzadeh et al., 2017) inspired by the introductory physics tutorial system in the University of Washington (McDermott & Shaffer, 1998).The curriculum used at the University of Washington is entitled "Tutorials in Introductory Physics" and was written by the Physics Education Group at the University of Washington.The Tutorials are worksheets that require students to work through concepts that have been identified by research to be particularly difficult.Some require students to perform experiments.However, there is still a traditional laboratory system for the first year physics courses at the University of Washington.
"Labatorial" comes from a combination of "laboratory" and "tutorial".In this new style of lab, students use a worksheet with conceptual questions, calculation problems, and instructions for experiments and computer simulations.Labatorials highlight physics concepts covered in lectures and encourage students to present and share their ideas with one another.Each Lbt worksheet starts with conceptual questions and then asks students to make predictions.After doing the experimental part, students need to explain whether their results support their prediction or not.Each lab section has one lab instructor assigned to a maximum of 16 students.In Lbt, students complete an Lbt worksheet in groups of 3 or 4 students.There are usually 3 to 6 checkpoints on each worksheet.The purpose of the checkpoints is to encourage an ongoing interaction between the students and lab instructor.Each time the students reach a checkpoint, they review the answers with the lab instructor.If the answer to a question is wrong or students are not proceeding in the right direction, the lab instructor leads the students to find the correct answer by themselves, exploring and discussing alternative ideas.

Measurement Tools
The purpose of this study is to investigate whether the combined use of RW and

Semi Structured Interviews (SSI)
We conducted semi-structured interviews with 7 students in fall and winter semesters at the beginning and end of the 13-week course.The interview questions relevant to this paper are found in Appendix A. All interviewees had passed physics in high school (grade 12) and were enrolled in a General Science major.
Prior to this study we conducted a pilot study and interviewed three first year students enrolled in Phys1201 course.The pilot study helped assess the feasibility of the project in terms of sampling and analysis.Interview questions were tested in this pilot phase and modified to improve this study.The results of the pilot study are not included in this paper.
The interviews served several purposes.They helped us gather information on how the concepts of force and motion are viewed by a sample of the students.
Most importantly, they also allowed us to see if the interpretations we made of the writing products were consistent with what interviewees told us.The Reflective Writing products of 41 other students who did not participate in the interviews were also assessed to improve our understanding of the results.In qualitative studies, interviewing is a major source data needed for understanding the phenomenon under study.We are aware of the fact that interviewing, like any other data collection techniques, has its strengths and its limitations.The interview is one of the best way to find out "what is in and on someone else's mind" (Patton 1982).Interviews allow a lot of detail to be collected that would not normally be easily obtained by other research designs.

Student Writing Products (SWP)
The second source of qualitative data used in this work was a rubric-based analysis of the students' Reflective Writing products (Appendix B).The rubrics were used both as an independent measure and as a cross-comparator to confirm the accuracy of student self-assessment as expressed in their interviews.We used the rubrics developed by Kalman et al. (2014Kalman et al. ( , 2017) ) to analyze the Reflective Writing assignments.The rubrics had undergone an extensive testing and development to ensure their reliability.Weekly RW products are a good method of examining the regular progress of students to examine if the students use this metacognitive technique to see the difference between their ideas and those found in the textbook and presented in class.SWP analysis was carried out on the work of students who participated in SSI sessions, and on representative samples of students not involved in the interview process.This analysis also served as a good triangulation with the interview data.

Participants
The Four first year students enrolled in Phys1201 course participated in the interviews held in a winter semester.The first interviewee was a student who intended to study geosciences in MRU subsequently referred to as Ahmed.We refer to the second and third students, who planned to study chemistry as Bill and Catherine respectively.The fourth student wished to enter the biology major beginning in his second year and we call him Dan.In the following fall semester, we interviewed three students enrolled in the Phys1201 course.These students all intended to take a general science degree and will be referred to as Elena, Frank, and Gabriella.All interviewees did the same Lbt.They completed 10 Lbt during the semester.

Student Responses in the Interviews
We explored what interviewees thought about the "relationship between force and motion" at the beginning of the semester.During the post-interview, we again asked what they had thought about the "relationship between force and motion" at the beginning of the semester and also asked about their present ideas about the relationship between these two concepts.Once it was established that the students' ideas had changed, we asked them to explain the particulars about how the change from the beginning of the semester to their present ideas were explored deeply during the interview.Table 1 shows the answers provided in the pre-and post-interviews.All interviewees mentioned Reflective Writing as one of the activities that helped them move from their knowledge about these two concepts at the beginning of the semester to their present ideas.
Ahmed states simply, "Force causes motion" The response is too vague to draw firm conclusions.This could mean that force is required to move thing from rest, or that force is required for any type of motion, including uniform motion.Ahmed's next sentence supports the former.An important milestone in replacing a common-sense "impetus" view of force and motion (Section 1 and 2) with the more-productive Newtonian view is for the student to develop/refine a definition of "motion".
Bill's pre-understanding of the relationship between force and motion was similar to Ahmed.In the post-interview he first explained the relationship between force and accelerations (Newton's second law) and used this relationship to explain accelerated motion and motion with zero acceleration.
Catherine used one sentence to explain the relationship between force and motion in the pre-interview.In the post interview she confirmed her pre-understanding of the relationship between these two concepts before taking this course and provided an example: "if I push a desk and so it moves."This shows that her pre-understanding was formed from her experiences in the life Table 1.Two pedagogical approaches.
Reflective Writing (RW) Labatorials (Lbt) Metacognitive activity; has students examine textual material, before coming to the classroom in the manner of a hermeneutic circle (Gadamer, 1975(Gadamer, /1960)).The Hermeneutic approach starts by having students initiate a self-dialogue about each textual extract.Within the framework of such a dialogue, there exist two "horizons": the horizon that contains everything that a student believes from the particular vantage point of encountering the textual extract & second horizon encompassing the potential in the textual extract; sense in which the words, in the textual extract, are related with in the language game understood by the author of the textbook.Student approaches textual extract with preconceptions (misconceptions).Key quintessential experience occurs when the student is pulled up short by the textual extract."Either it does not yield any meaning or its meaning is not compatible with what we had expected" (Gadamer, 1975(Gadamer, /1960: p. 237): p. 237).At this point the dialogue begins.The student questions what is known within the entire horizon (Kalman, 2011: p. 163).
Developed by Physics Education Development group-University of Calgary (Sobhanzadeh et al., 2017) inspired by introductory physics tutorial system at University of Washington (McDermott & Shaffer, 1998)."Labatorial" -combination of "laboratory" and "tutorial": students in groups of 3 or 4 students use a worksheet with conceptual questions, calculation problems, and instructions for experiments and computer simulations.Worksheet start with conceptual questions and then asks students to make predictions.After doing the experimental part, students need to explain whether their results support their prediction or notand complete an Lbt worksheet.
Usually 3 to 6 checkpoints on each worksheet to encourage an ongoing interaction between the students and lab instructor.At a checkpoint, they review the answers with the lab instructor.If the answer to a question is wrong or students are not proceeding in the right direction, the lab instructor leads the students to find the correct answer by themselves, exploring and discussing alternative ideas.
world.She explained her understanding of the relationship between force and motion at the end of the semester by providing an example and as can be seen in Table 1 it contained more details and differentiated between a uniform motion (no friction) and accelerated motion.
At the beginning of the semester, Dan believed that an agent was needed to create motion.As he explained in the post-interview, he lacked the ability to make a connection between physics concepts before taking this course.
As can be seen in Table 1, Elena's explanation of the relationship between force and motion is based on her observation and life experiences and her understanding is not extended beyond these.She believed that a force was necessary to keep an object moving and provided an example of a car that eventually stops if she doesn't push it.In the post-interview the interviewer asked about her understanding of the relationship between force and motion before taking Phys1201 course and then the interviewer asked her to explain her present ideas about the connection between these two concepts.In the post-interview she explained that a force causes motion but a force is not needed to keep an object in motion.
Even if Frank believed that he didn't use his pre-understanding and it was not easy for him to think about the application of the physics concepts in real life, he used his experience to explain the relationship between force and motion.In the pre-interview he said that he had no idea about the relationship between force and motion and I asked him to guess based on his experiences and observations.
In the post-interview, he was confident and provided examples to support his explanation.
In the pre-interview Gabriella explained that force influences the speed of an object.In the post-interview, she talked about the influence of force on both magnitude and direction of velocity.She used Newton's second law to explain the relationship between force and motion in the post-interview.
As you see in Table 2 at the beginning of the semester, all students' ideas about the relationship between force and motion are drawn from real-life experience.They all provided a causal explanation to discuss the relationship between force and motion.Moreover, at the end of the semester, interviewees were able to make comparisons between uniform motion and accelerated motion.For example, at the beginning of the semester Elena believed that "when the applied force is gone the object stops finally".However, at the end of the semester Elena explained that "in a uniform motion the net force is zero".
Toward the end of the semester, interviewees explored the relationship between force and motion for special kinds of motion (uniform motion and accelerated motion) rather than for the general case.Interviewees formed explanations of the relationship between force and motion prior to scientific reflection.
Student learning was not a correction by science of prior mistaken ideas, but extension of ideas to idealized situations.An example of an idealized situation is motion of an object without friction such that the object keeps moving with constant velocity while the net force acting on the object is zero.This example Before I didn't know about uniform motion and accelerated motion.Now I can make a good connection between uniform motion and Newton's first law.I can also see the connection between Newton's second law and an accelerated motion.Before, I didn't consider various forces acting on the object but now I first try to draw a free body diagram and consider all the forces acting on the object.When we learned about Newton's laws I learned the accelerated motion and uniform motion better.For example, it made more sense to have a zero net force in uniform motion.

Bill
The applied force makes an object move.
We need a force to change the motion.When there is a force then there is an acceleration and so we deal with an accelerated motion.But there is no force on an object moving with zero acceleration.
Catherine Force creates motion.
Well I know a lot more now.There is no friction and you push someone and he keeps moving and then you need another force to stop him or when there is a continuous force on an object then there is an acceleration.

Dan
Force, or applied force, you know, an agent that can push or pull an object.Motion is when an object is moving.There must be an agent to create motion.
We need force to create motion.The relationships between these two concepts are well explained in Newton's laws.For example, an object in motion stays in motion unless there is a kind of force put on it.

Elena
Force makes objects move.When the applied force is gone the object stops finally.If I push a car it starts moving but it stops finally.But if the driver starts the car then it keeps going since the engine provides the applied force." We need a force to cause motion but we don't need a force to keep moving.If I push my friend in hockey, he keeps moving since the friction is very small.We also have different kinds of motion.Uniform motion, accelerated motion.To have acceleration, we need to have a net force, but in a uniform motion the net force is zero.

Frank
Force is pushing and motion is moving.You push something and it moves.
Force is in newtons and is the result of pressure.Like applied force.I push you and the result of this pressure is force.Motion is the result of force.I push you and you move.If you don't move, then there is another force that is against your motion.Like friction.That is why we usually talk about a net force in physics."

Gabriella
An object in motion has speed.If a kind of force is exerted on an object, the speed will change.
I know more about force and motion now.A force can change the direction of motion and also the speed of an object.This is what Newton's second law is about.The relationship between force and acceleration and there is an acceleration when the velocity changes.Creative Education (students' explanation of the relationship between force and motion at the beginning and end of the semester) suggests that all interviewees experienced an expansion of their horizon during the semester.
All interviewees except for Frank argued that they used their pre-understanding, going back and forth between their horizon and that of the textbook, making comparisons with and reasoning about the materials presented.

Students' Reflective Writing Products
In this section, we review the Reflective Writing products of each interviewee.In the next section, we will assess the writing products of a randomly selected cohort of non-interviewed students enrolled in Phys1201 course in order to triangulate with and improve our understanding of the results.The analysis of the interviewees' Reflective Writing products helped us to confirm that they were actually doing what they said they were doing in the interviews.

Ahmed's Reflective Writing Products
In the third Reflective Writing assignment Ahmed explained his understanding of the limitations and restriction of using projectile motion formulae in real life situations: "for the purpose of giving real life examples, most of the time in this course we will pretend that air resistance is negligible in order to get an idea of what the object should do."Even though he explained the main concepts in his own words, he didn't use a Reflective Writing style to discuss the factors such as launching angle and initial velocity affecting a projectile motion.In the post-interview, Ahmed mentioned explaining part of his learning strategy: "In my opinion I understand something when I can teach it or explain it.Reflective writing is like explaining materials" and this is consistent with his writing prod- ucts.However, when a topic such as "projectile motion" contains many writing assignments to assess equations and formulas there is not enough effort in understanding behind each equation.
In his fourth Reflective Writing assignment about Newton's first law and forces, he made a good connection between the new concepts and the ones taught in the previous chapters.Beside the explanation of an example provided in the textbook, he talked about his experiences of gravitational force and driving to clarify Newton's first law.He used his own real world experiences to explain the main concepts such as friction: "A good example of humans overcoming friction comes from waterslides.To go down a regular slide there is too much friction to allow your pants to slide down the inclined plane at a very fast speed.However, when you run water down the inclined plane it reduces the amount of friction between you and the slide allowing you to travel down the slide much faster causing a much more exciting ride." In his next assignment about Newton's second law, he provided a summary of the concepts presented in the textbook as well as his own understanding of them.
When a topic was easier to understand, Ahmed relied more on his own understanding and didn't make comparisons between his understanding and the ma-DOI: 10.4236/ce.2018.94041586 Creative Education in real life.Her explanation of Newton's first law contains an ideal situation in which there is no force acting on the object: "If there is no force acting on a particular object, the object will stay at rest and if it is moving, it will keep going at the same speed along a straight line.However, there will always be some external forces involved when looking at an object's motion."Catherine provided a summary of the concepts covered previously, but didn't relate them to the new concepts in her writing assignment.The example provided to clarify Newton's second law is the explanation of a numerical example provided in the textbook.As she explained in her pre-interview, the examples provided in the textbook helped her think about the situations related to the concepts and in this assignment the numerical example provided in the textbook inspired her to explain it in her own words: "There are usually some examples in the textbook that help me come up with a good example."The assignment ends with the student's methodology to solve the problems related to Newton's second law.
Catherine explained her own experience of pushing a chair to clarify Newton's second law in the fifth writing assignment.Clear explanations of the main con- Most examples are numerical and the strategies of solving problems are emphasized: "On the moon an astronaut jumps 2 feet straight up, despite the weight of his space suit which weighs 370 on earth.On the moon, he and his suit together weighed only 90 pounds with g = 1.6 m/s 2 ."The explanations of equations are clearer and there are examples provided to clarify the formulas: "The Newton's second law equation shows that the acceleration vector points in the same direction as the net force vector.When several forces act on an object, we have to watch and make sure not to think that the strongest force will overcome all the other forces because it will not.It is the net force or the sum of all forces.Forces are vectors and we need to add them using vector rules.So, the force in the Newton's law equation is the net external force and acceleration has the direction of this net force."Dan also explained in Reflective Writing 5 the unit of force based on the Newton's second law formula.He provided a good explanation of Newton's laws in his writing assignments.

Gabriella
Gabriella explained both Newton's second law and Newton's third law in one assignment and provided examples to explain the relationship between them: "I use Newton's third law and Newton's second law when I go swimming with my friends and we try to race each other.While starting I use my feet to push off the wall.The more force I apply on the wall, the faster I am moving in the water.This is because the wall exerts the same force on me as I apply on the wall, but in the opposite direction.When the force from wall on me is bigger, based on Newton's second I have a bigger acceleration which means that change in velocity in a time interval is bigger and I have a great chance to win the race." Gabriella also related Newton's first law and Newton's second law and also integrated diagrams and photos in this assignment: "An object in motion at constant velocity will continue to remain in motion in a straight line unless an outside/unbalanced force acts on it.It is this outside/unbalanced force known as net force that when acting on an object can change the velocity (magnitude and/or direction) and cause the object to accelerate that creates Newton's Second Law.It is simply a continuation of Newton's First Law.After reading the textbook section on Newton's second law, the figures and examples seemed confusing to me.I had no idea why forces acting on an object were projected on x and y axis.But when I understood the relationship between outside/unbalanced force and acceleration they all made sense."

Study of Non-Interviewed Students
To examine the consistency of the above results we examined, the writing products of non-interviewed students who completed Reflective Writing assignments and gave permission to use their writing products in this study.Sample student responses are given in Table 3 for both the beginning and end of the semester.
Note that student explanations of acceleration and Newton's second law often refer to one-dimensional cases.In the topic of projectile motion and circular motion students need to think about motion in two dimensions and the effect of forces in a two-dimensional case which violates their intuition that things always go in the direction that one kicks them (White, 1984).

Conclusion
The strength of this combined approach is its emphasis on writing, metacognition, and the development of conceptual knowledge.Students/peers are challenged to compare their ideas with accepted scientific views since as previously C. S. Kalman et  The concept of acceleration is the amount of how fast an object is moving by time.
An unbalanced force can change the direction or magnitude of velocity.We know that acceleration is related to change in velocity and so there is a net force acting on an object in an accelerated motion.

2
Displacement is the area travelled by an object with respect to a starting point and the distance is [has] the whole area travelled from the starting point to the final point.
The work done by a force is related to the displacement.Displacement is a vector that shows the position of an object with respect to its initial position.

3
A projectile motion is a uniform motion since the initial velocity is the same as final velocity and velocity is zero in the middle and the parabola is uniform.The acceleration is also uniform and is −9.81.
Dynamic equilibrium is the same concept as uniform motion in which velocity is constant and acceleration is zero.

4
Velocity is a vector quantity, meaning magnitude and direction which is the distance an object has travelled relative to its starting point at two specific points in time.
In a dynamic equilibrium, velocity is constant which means that change in object's position over a given amount of time is constant.

5
Acceleration means speed is increasing and deceleration means speed is decreasing and accelerated motion means uniform increase in speed and has a direction since it is a vector.
An object accelerates when its velocity changes.Newton's second law shows that when an unbalanced force acts upon on an object the velocity changes and object accelerates.

6
Acceleration is the slope of velocity and velocity has a slope when object moves uniformly and this means that acceleration is constant and slope of acceleration is zero.A positive slope of velocity means that acceleration is positive and doesn't mean that direction of motion is positive Acceleration and velocity have the same sign when an object is speeding up.An object speeds up when I drop it and so acceleration must be negative since velocity is downward.
When it comes to Newton's second law, net force is downward and has the same direction as acceleration.

7
Acceleration is most closely related to position versus time, just has a magnitude since it is a vector.
Acceleration is a vector quantity meaning it has direction and magnitude.Acceleration is the rate of change of an object's velocity in relation to the time.Newton's second law states that an object's acceleration is dependent on two variables, the net force acting on it, and the object's mass.

8
Acceleration is the curve of velocity time graph.In a velocity time graph the line would curve representing that the object is speeding up.In a uniform motion velocity time graph is a straight line.An example of acceleration would be a car speeding up from rest after the traffic light turns green.In this example acceleration is positive.Acceleration can also be negative which shows that the object is slowing down.
Newton's second law of motion states that when a net force acts on an object, it will change the object's velocity and cause an object to accelerate.The shape of the velocity time graph reveals useful information about the acceleration.A horizontal line shows that acceleration is zero.A positive slope shows a positive acceleration and a negative slope shows a negative acceleration.Creative Education Continued 9 Uniform motion is a constant velocity time period, which means you were traveling at a steady unchanging speed at any time.
Uniform motion is when an object is travelling at a constant velocity.When velocity is constant then acceleration is zero.
If a body has no acceleration, then the forces acting on it must be in equilibrium and so there must be a zero net force.
10 Displacement is the change in position while distance is the total displacement travelled.
By reading the textbook I learned that gravitational potential energy depends on the height of an object not the path travelled.I conclude that gravitational potential energy depends the displacement in y direction.Now I understand the distinction between distance and displacement.Displacement is the difference in where you start vs where you end, while distance is the total path covered.

11
Uniform motion is a pretty easy one to explain, in that it is the movement an objects makes in constant time without changing the position in each period of constant time and how fast it is going.
Newton's first law states that every object stays at rest or in uniform motion (motion in a straight line with constant speed and direction) unless a net external force acts on it.
12 Uniform motion is the rate at which an object moves at equal distances.It doesn't mean that direction of motion is positive even if it is positive.A pendulum would be going in uniform motion because it is travelling the same distance every time.
The key point is that if there is no net external force acting on an object and thus the object maintains a constant velocity.If that velocity is zero, then the object stays at rest.If the velocity is not zero, then the object maintains that velocity and moves in a straight line, which means the direction of motion is also constant.
noted each time the students reach a checkpoint they review the answers with the lab instructor.If the answer to a question is wrong or students are not proceeding in the right direction, the lab instructor leads the students to find the correct answer by themselves, exploring and discussing alternative ideas.
We  Clearly sets out how the student's own ideas about concepts differ from the versions found in the textbooks Sees that there is a conflict between the students' own ideas and versions found in textbooks without clearly setting out the difference Notes a difference between the students' own ideas and the versions found in the textbooks without any explanation No conflicts identified Student's reflective writing product contains some conflicts that students has not realized and addressed.

6
If there is any conflict identified, student discusses the conflict between the ideas/facts/data Student sets out a discussion of the difference between the students' own ideas and the versions found in the textbooks trying to fully understand the difference Student attempts to discuss the difference between the students' own ideas and the versions found in the textbooks Student notes the difference between the students' own ideas and the versions found in the textbooks without any discussion No discussion 7 In addition to identifying a conflict, Student formulates his/her own question(s).
Student realizes that there are concepts in the textbook that s/he does not understand and elaborates a clear question.

Student sets out a question that is not clearly formulated
The question formulated does not address the conflict between the students' own ideas and the versions found in the textbooks.

No questions given
study was undertaken at Mount Royal University (MRU).All instructors use clickers in the class.The marking criteria and assignments and activities are the same in all sections.The classroom instructors were not part of our research team.Most students at MRU taking introductory physics courses are enrolled in the General Science majors.All students enrolled as General Science majors have to take Classical Physics I (Phys1201) and Classical Physics II (Phys1202).Students were randomly assigned to all sections by the Registrar's office.
of the semester had occurred.The activities mentioned by students cepts and the relationship among them suggest that Catherine spent a great deal of time thinking about the concepts and explaining them in her own words in this assignment.She also provided a real-world example to explain Newton's first law and its relationship to the second law.This assignment confirms what she said in the post-interview: "To be honest I didn't take the course seriously and I just wanted to pass it but after the first midterm I realized I would have to work hard to pass it."Dan'sReflective Writing Products A summary of the main concepts as well as student's own understanding are presented in Reflective Writing 4 and 5 about Newton's first and second laws.
Writing assignments 5 and 6 are similar to assignment 4.There are conceptual examples in addition to numerical examples to clarify the meaning of the con-C.S. Kalman et al.DOI: 10.4236/ce.2018.94041587 Creative Education cepts.Elena tried to make connections between Newton's second law and the concept of acceleration.Frank Frank explained in both pre-and post-interview that the examples provided in the class and textbook helped him get a better understanding of the concepts.
have demonstrated that the combined use of Reflective Writing and Labatorials in an introductory physics classroom leads to conceptual change; i.e., a conversion of pre-existing concepts of force and motion to the Newtonian viewpoint.Students significantly increase their knowledge of Newton's theory of force when exposed to these interventions.This result is apparent because at the end of the semester interviewees discussed the relationship between force and motion in detail and used other physics concepts such as acceleration and Newton's laws to support their explanations.The consistency of the interviewees with the class in general was given by examination of the writing products of 12 random non-interviewed students who completed Reflective Writing assignments and gave permission to use their writing products in this study.Further research should be done to get an in depth understanding of how conceptual change occurs with these interventions and to find ways to strengthen this change.Meets criteria C. S.Kalman et al.

Table 2 .
Students' understanding of the relationship between force and motion.

Table 3 .
al. Comparison of student explanations of the force and motion concepts at the beginning and end of the semester.