My Take
Students get to visually see the graph of their equations and discover the zeros/roots of those equations. Students can see how the graphs change by changing constants and exponents. This works well with a variety of levels and students can work with it at home or at school without an added expense.
How I Use It
I use it to explore different types of graphs in Trigonometry and Pre-Calculus. It is also helpful for students in Algebra 1 to hand graph then see the result on geogebra, then check to see how well they did. I use it to have immediate feedback so students can see how well/poorly they are doing and what they need to work on.