I saw this website the other day and wanted to share. While I am not familiar with this ministry after downloading their free Bible Study resources they seem very straight forward and Biblically sound. They offer full Bible study courses that could be used as a high school credit course. They even have lessons for the younger set.
Check out The Church of Christ in Zion, Illinois.
Home Life Ministries offers Biblical character training lessons on line.
Another on line Bible study for children that offers downloadable supplements is eBibleTeacher.com
Christians Answers has a ton of coloring pages, lesson plans and activities sure to keep you busy while you explore everything offered.
I know there are a whole lot more Bible study sites out there but these are a few that I have used in the past. If you search the web, I’m sure you will find a ton more.