I just learned about and ordered The Didache Series. We are starting with The Scriptures but I do not know if I can wait to order Church History. They also have the Faith and Life series for younger students.
You can click "free lesson" to get an idea of what the course is like.
Here is the info on My Catholic Faith Delivered in general and then The Didache Series Online:
present The Didache Series Online
This web-based series draws from sacred scripture, the lives of the Saints, and the Doctors and Fathers of the Church. Its engaging online format allows for anywhere and anytime learning. The assessments offer real-time feedback and the reporting data eliminates the extra paperwork needed to track progress. The embedded links and videos allow for additional learning and support. Voice-overs and the ability to enlarge font size are standard for those who need that additional support.