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.

Discussion of measuring experience creation of "What I Know" web.

Objective: To discuss the measuring experience, and to focus the thinking of students on the topic of whales!

Activity: Bring the group together and ask them to reflect on the size comparison experience. Students are encouraged to share information which they already know on the topic of whales. The teacher can record this information by creating a web.

Assessment: Student contribution to the group discussion and quality of web which is created.