As I have visited schools across East Lothian this year, I have shown several maths teachers the Geogebra dynamic geometry package. They have all been impressed, but asked for more support in learning how to use it. This morning, I've put together a quick screencast to show the basics of using this excellent Open Source program. This first screencast looks at the geometric constructions that you can create. My next screencast will look at graphs and functions.

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