Kahn Academy - saw a story on this on 60 Minutes this week. The site is FREE and has thousands of tutorial videos and practice lessons for nearly every subject. Teachers (and homeschool parents) can track their students' progress. Go at your own pace. Did I say it was FREE???
Khan Academy - "There are literally thousands of educational videos on any conceivable topic - from Basic Addition and Biology to Art History and Physics - all totally FREE. All the videos are in bite-sized chunks about 10 minutes long done with a microphone and virtual chalkboard. Most of the topics are clearly for a high school or adult audience, but there are several topics geared toward the lower grades." says teacher blogger Corrina Allen