How I Use It
I use this tool for a variety of things. It is good for geometric drawings and explorations, transforming figures and more. It is also great for demonstrating behavior in algebraic functions. I really love the trace feature where you can help students to see a graph being drawn in real time. My pre-calculus students really connected with this when we looked at the graph of the sine function and how it related to the unit circle.
Geogebra is a great dynamic tool that enables students to interactively explore a wide variety of mathematical concepts. Teachers and students can create their own works, or use graphs that are available on the Geogebra site. It is a great option for helping students to "see" mathematics in action!