The games are designed to be played as homework. Worksheets form part of their homework, and the content is exactly what they need to understand in class. The best homework is the homework that students WANT to do. All games engaging and fun to play, so homework is no longer a chore!
The worksheets act as a good gauge on areas they may need more help with. Worksheets do not list grade levels, so students may be given worksheets from one- or two-year levels below their current grade.