Would you add Smath Studio or MathCad document and units functionality?
This tool is pretty great as is. I wish it were available when I was in high school. It does a good job of allowing the student to drill algebra, geometry, trigonometry, & calculus. What is missing I think for students is the ability to make quality documents with inline equations and units accounting as mathcad and smath studio are capable of doing. The usefulness of this tool could be greatly extended with a mixed mode document editing plus equation editing capability, while continuing to provide immediate solutions to inline or blocked equations and the added ability to resolve units for physics students and engineers. Below is a URL document which shows what smath studio can do, smath studio is open source software as well. If this capability already exists within geogebra I have not found it please provide a pointer in that case.