Students build and work with models to investigate fixed pulleys, movable pulleys, and belt drives. The set is designed to be used by students working in pairs. It includes:* 2 building cards with step-by-step instructions * Sturdy plastic storage case with clear compartmentalized tray * Pictorial parts list to make clean-up and inventory simple. Pulleys Class Pack: This pack delivers the hands-on learning of the Pulleys Mini Set to the entire class! Serves 24 students working in teams of two. * 12 Pulleys Mini Sets (779614) * 20-page Pulleys Teacher Guide (779624) * Individual storage case with each set. Pulleys Teacher Guide: This guide contains 12 lesson plans, introductory pulley activities, and problem-solving activities based on pulley concepts. Also contains:* Photographs of real-world pulley devices * Background information for each subject * Suggested problem solutions * Assessment ideas.