Demonstration

Image	Title	Body
	not sure yet
	"Move Until Near" Certificate
	Bill Nye on levers
	"Move Until Touch" Certificates
	"Turning" Certificates
	"Move Until Dark" Certificates
	Gear and Bushing Photo
	Introduction to Gear Trains_Prim
	The NXT Computer_Demo Program
	Gear & Wheel video
	Getting in Gear_Supp_Video
	Circuits and Switches_Ext_Lab
	Engineering Challenge #2_Robo-Tagger_Supp_Video_Portrait

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