My new favorite website is http://www.mobymax.com/. It is an amazing website that adapts to each child's individual needs.
I created a summer school class. The program starts with a placement test for math, language, and vocabulary. Based on their score, they were placed in work appropriate for their individual needs. My students love it! They have a lesson followed by a quiz. Each time they pass, they earn game time. The students love playing the games. However, this is not why they really like this program. They love it because they feel successful. Most students have been getting 100% on their initial lessons. They are excited to do the work.
I can't wait to continue using this program next school year!