Very useful app overall. I am currently taking calculus 1 having no pre-calculus experience and having an app like this is a gold mine of free education for me as unit circle is very important. I was able to use it to review and re-memorize the values and it has helped me a lot. I really enjoy how hands on it is compared to just trying to memorize the values on your own, and I feel like I get much better value out of this than anything else I have tried.

The program has helped to raise student performance at a time when many schools in our area are seeing declines in math scores. I recommend these apps for the classroom!

My class enjoys the hands-on aspect of the apps. They are focused on the outcomes of the lesson.

This tool has massively increased the performance of my younglings in certain mathematical aspects. When I found the website it was our saving sigma, the ability to practice such a simple subject in a simple app is outstanding. I'm from a small school in the western region of the U.S. and I have found this app extremely useful for taking my nephews education to the next level.