How I Use It
I don't teach geometry, but in the past, I have used Geogebra instead of sketchpad.
Constructions with rulers and compasses are a pain and irrelevant. Geogebra lets you do it all using technology. Euclid wishes he had Geogebra
Why buy Geometer's Sketchpad when there's Geogebra.
The app/website is incredibly efficient and powerful.
It's great to demonstrate all kinds of geometric concepts