Uzinggo uses Adaptive Curriculum‘s Activity Objects (interactive lessons), but gives you a better up-front interface and assigns the lessons based on your child’s progress. Students earn Zings (points) and badges for successfully completing lessons. Zings can be used to make in-program purchases (upgrading their avatar, etc.), buy real world stuff (gift cards, small items), or to make a charitable contribution. Students work on their own and progress through the units as they are assigned by Uzinggo. Parents can see progress and assessment scores.
Cost is $9.95/month for either Math or Science at either High School or Middle School level. To get both subject at either level is $14.95/month. This is for a single student. Paying for a full year gives a 20-25% discount. Check out Homeschool Buyers Co-op for a 40% discount.