If you live in Ohio you should try Ecot! But they are in high school so go to this link it works great.
http://www.k12.com/
I hope I helped! Good luck:)
For free, you might want to consider doing some book-based studies along with your on-line studies. Using on-line encyclopedias, find topics in history, geography and science. Then go to your library’s website or ask a librarian to help you find up books with those topics. Have the kids write reports, outlines, timelines and map work right from the computer. For high school English, the 3 important areas to cover are literature (including a year of U.S. and a year of British), grammar and writing papers.
Make sure you check out what the high school graduation requirements are for public school kids if you aren’t going with pre-packaged materials- so you can feel confident there are no big learning gaps and that their diplomas are accepted.
Be critical of on-line sources too. Hope that helps.
pen island.com they specialize in rigourous curriculum tailoredd to ur child’s needs.
Penn Foster high school on-line. It is good priced and kids work at their own pace. One subject at a time, They are not overwhelmed with homework.. I like this.
Try Gorman learning center!