What is the difference between radius and diameter? How about cm and cm-squared? These issues are a never-ending source of confusion for students as they try to master the computation of area and circumference of circles. This card game is designed to take your students away from the worksheets by letting them discuss key vocabulary and concepts with a partner. Included in this set are 30 cards: 10 circles, 10 area, and 10 circumference. Half of the circles indicate radius, and half indicate diameter. You will love to hear your students using proper terminology as they exercise mental computation and master the concepts. This activity is ideal for English Language learners, and it complements your Common Core program. Whether you use these cards as a center or whole class project, your students will be engaged as they learn in this kinesthetic activity. - from Judy Seki for "Math in a Flash!"