For one ds I used Alpha Omega Life Pac Art. It covered different art media and art terms (value, scale, line...).
For my other ds he earned 2 Fine Arts credits, For one credit he learned to play piano: completed 2 adult piano books and performed certain pieces from the books. For the 2nd credit he read Sister Wendy's The Story of Painting and wrote a research paper on a specific art period, he also had to visit the art museum several times to find specific examples of art period/artist/art vocabulary (use of line, shading, shadow...)
For my ds who is doing high school now, he is working through Artistic Pursuit bk 1 and 2. He tried going the piano path but died when he got to When The Saints Go Marching In...never could get it, got frustrated, and quit. He now is trying the art books. He is NOT an artist (his stick figures look deranged) but he is getting a grade on each project if he meets each requirement, puts an actual effort into it, and is creative. He is surprising both himself and me with his drawings, very pleased with this program.