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.
Creations of advertisements
Objective: To develop an advertisement for a specific audience to whom they want to "sell" something.
Activity: In groups of four, students develop an "advertisement" (a rap, a poster, a letter, or other medium of students' choice) about their school for fifth grade students.