This workshop is specifically about writing an applet – an interactive worksheet that can be stored and accessed on Geogebra’s classroom resource area – for private, shared or public use.
15 minute tutorial for first time users
Here is a short tutorial for someone who is looking up Geogebra for the first time: Geogebra classic tutorial. It’s not necessary to download Geogebra to use the tutorial, but it would be handy to have Geogebra Classic 5 downloaded for the workshop.
Build this one
The double triangle diagram has a few nice steps (also multiple approaches…).
Here’s a how-to video to walk you through.