Video
I just previewed the 30-minute video, "Martin! God Loves You" for grades 1-8. It is a companion to the book, Martin Luther! God Loves You." It think is is the most accessible biographical material about Luther and the beginning of the Reformation for this age group. It also avoids sounding anti-Roman Catholic, which I find is the tendency of some material I have looked at.
The video is available from Morning Light Media, 10300 Watson Road, St. Louis, MO 63127.