Elicit non-trivial dialogue from students. Guide students to reflection and analysis of the experience. Encourage students to share their perceptions and beliefs. Summarize and review similarities and differences.

Each group shares their classifications, followed by general discussion.

Objective: To enhance student ability to discuss what they have observed. To arouse curiosity for the material to be presented.

Activity: One student from each group reports on how his group classified the exhibits. The teacher lists the classifications on the board. General discussion follows after all groups have reported. It is not necessary to name all the conic sections at this point.

Assessment: Quality of discussion and participation.