This resource book contains 15 magic tricks based on the properties of whole numbers that are intended to spark the interest and imagination of students. Following each activity, students are asked to write about their discoveries and to create their own magic tricks. A matrix of skills for all the activities and lists of the materials required for each activity are included. Each of the activities has three sections: unraveling the trick, questions to ponder, and further investigations. The emphases of these activities are on student discovery, critical thinking, verbal and written communications, and creativity. The tricks work well in whole class or small group situations. (DDR)