First, second and third class levels. 6-10 lessons for classroom learning. 62 elements including assorted beams, bushings and a weight element. 2 full-color building instructions - non-text. A storage box with sorting tray and lid. Benefits for the Teacher: Simple and in-depth introduction to levers. Efficient classroom management. Short preparation time. Benefits for the Pupil: Free open-ended activities. 62 piece set.