I just picked up a copy of The High School Learning System. It's an interesting package--multimedia presentations on English (with ebook texts), history (US and World), math (pre-algebra through calculus) and science (mostly biology) with Q&A and quizzes assess learning (if you want to do that). The presentation on the French Revolution lasted about 20 minutes of narration with period background music and pictures. They included a good amount of detail, covered the various governments between 1789 and 1799 and offered a 101 question online "quiz" (sounds like a test to me!) at the end.
I was less impressed with the math section. I noticed on their website that they have a stand-alone math learning system product, so that may be why this section is less comprehensive.
I have the 2006 version, which I bought on ebay for $13 (2 DVDs and 1 Spanish-English online dictionary). The 2007 version costs $40 and includes:
"• All core subjects covered
• 86 integrated educational titles
• 54 hours of multimedia presentations & video
• 37 hours of audio books
• 101 Barron’s Book Notes
• Printable tests to monitor progress
• PLUS new educational material for your iPodTM"
I think this would be a great resource for younger gifted kids working at a high school level, for homeschooling teens and/or as a review for regular high school classes.