Agreed. 50 bucks is not expensive for what could be a valuable investment. It's on my TODO list. If it works well to teaching me mathematics, then I'll keep usi

Agreed. 50 bucks is not expensive for what could be a valuable investment. It's on my TODO list. If it works well to teaching me mathematics, then I'll keep using it. That said, I think it's also important to be able to learn from books, which is a useful skill in my opinion.