Probability and Statistics Clever Catch provides an excellent way for students to challenge themselves while learning. There are 87 facts included. Clever Catch can be used at school in organized classroom activities. It can also be used at home.For grades 9-12 Enjoy learning and reviewing probabilities and statistics with our new Probability and Statistics Clever Catch ball. This durably built 24" ball will provide hours of educational excitement. Statistics has never been this fun. Simply toss the ball around the classroom, gym, outside, or at home and students answer the questions found under their left thumb. Includes 87 challenging questions with a complete answer sheet.