Taking into consideration the pedagogical potential of images, we proposed to analyze the contribution documentaries produced for educational purposes, the understanding of concepts related to entomology. Therefore, we organized a sequence of biology teaching. In our work, we developed diversified activities that were planned and organized in advance, but to create teaching situations where students could analyze their previous knowledge. The teaching sequence was subdivided into three meetings, which were used insect images, text problem situation and documentaries produced for educational purposes. All activities were audio recorded. Participated in the activities of high school students involved in a program of Adult Education. After analyzing the data generated, it can be concluded that these documentaries supported the development of more complex representations, which leads us to infer that this type of teaching resource is an important additional resource of learning, since it is widely considered by students.