Have you ever looked into homeschool learning styles? Most homeschoolers have. Did you know that Time4Learning.com incorporates all three of the most common learning styles? Kids who are auditory learners read through the text or have it read to them. There are plenty of pictures and graphs for visual learners. For the kinesthetic learners there are quizzes dotted throughout each lesson for them to work through. They are also encouraged to compile vocabulary lists and take notes.
I can’t think of any other online learning that is this affordable and also includes each learning style.