Encourage tinkering with ideas, relationships, connections. Set up situations where students have to find information not readily available in school texts. Provide opportunity for students to design open-ended explorations of the concept. Provide multiple options so students can plan a unique "proof" of learning.

Students choose an activity, ex. create a collage of items that are rectangles, etc.

Objective: Personalize what the students have learned about the properties of rectangles, rhombuses, and squares.

Activity: Students choose one of the following: ï Create a collage of items that are rectangles, rhombuses and squares that represent who you are.

Write a short story, poem, or a skit emphasizing the necessary and sufficient conditions (properties) of rectangles, rhombuses, and squares (group or individual).

Survey the school, a home, a business, and a fast food place for all of the items that are made of either rectangles, rhombuses, and squares. Observe at least 50 items in each place. Record your findings in chart or graph form. Using your results answer the question, "What if rectangles, rhombuses, and squares did not exist?"

Create or build some object using at least one rectangle, square, and rhombus. (Group or individual)

Assessment: Effort and enthusiasm; possibly contribution to the group.