K5 Learning has an online reading and math program for kindergarten to grade 5 students. I've been given a 6 week free trial to test and write a review of their program. If you are a blogger, you may want to check out their open invitation to write an online learning review of their program.
Be watching, over the next several weeks, to hear my thoughts and ideas about this program! It looks really neat and definitely helpful, especially for homeschoolers, but for any family as an enrichment tool!