I came upon this post on the Timberdoodle blog. Timberdoodle Co. is a homeschool supply company. They sell curriculum as well as other educational items. This post was very helpful if you have high schoolers who aren't quite sure what to do after they graduate. It discusses GEDs and I'm not really a proponent of them, but the article gives some very helpful insight.
Career Planning for Your Homeschooled High School Students, 9 Tips and Thoughts