Back to Chalkboard Teach Lesson 01 – What Is a Pulley? View Activity Lesson 02 – Experiment: Make a Simple Pulley View Activity Lesson 03 – Experiment: Make a Moveable Pulley See More Lesson 04 – What Is a Gear? View Activity Lesson 05 – Pulleys and Gears in Daily Life View Activity Lesson 06 – Two Ways to Save Energy View Activity Lesson 07 – Opposite Directions View Activity Lesson 08 – Changing Direction: Bevel Gears View Activity Lesson 09 – Changing Direction: Worm Gears View Activity Lesson 10 – Changing Direction: Rack and Pinion View Activity Lesson 11 – Bicycle Gears View Activity
