Back to Chalkboard Teach Lesson 01 – What Can Forces Do? View Activity Lesson 02 – The Force of Gravity View Activity Lesson 03 – The Force of Magnets View Activity Lesson 04 – The Force of Friction View Activity Lesson 05 – How Friction Helps Us View Activity Lesson 06 – A Snowy Day View Activity Lesson 07 – Contact and Non-Contact Forces View Activity Lesson 08 – Experiment: The Force of Static Electricity View Activity Lesson 09 – Wind and Water View Activity Lesson 10 – What Can Wind Do? View Activity Lesson 11 – Machines That Move Air View Activity