Price: 125 points or $1.25 USD

Subjects: math

Grades: 6,7,8

Description: Ten cards ask students to calculate the circumference using pi = 3. All answers are whole numbers. 5 cards have radius and 5 cards have diameter. The challenge for students is to use both circumference formulas interchangably in order to solve for the circumference. Students are meant to do the work primarily in their heads.