If used effectively, I think that this site is a really good tool for students who are at least taking an intermediate algebra class and higher math. I spent 45 minutes reviewing the materials, playing with the graph function tools and found it simple and easy to use. Content quality is good; the site offers concepts that are educationally significant because you get instant results. Students and teachers will benefit by the ease-of-use and visual concepts of graphs. Lastly, first-time users will find this a fun and simple way to understand graphs and how they are used.