Demonstration

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

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