<p>Perhaps CTY, but cannot vouch for quality. Younger son will be taking on-line geometry in order to skip a year of HS math. HS approved course and said curriculum seemed very similar and used same textbook as HS course did. I think the class is $900 or so.</p>
<p>Younger son loves Kahn Academy and edX, but the edX class he took was a college class, Intro to Programming. (He liked the Harvard course better than the MIT course, but I do not know why.) edX course was free as are the Kahn Academy classes. </p>
<p>Brown undergrads developed an Engineering survey MOOC for HS students, new this year. Info here:[Brown</a> University Creates Online Course for High School Students - NYTimes.com](<a href=“http://thechoice.blogs.nytimes.com/2013/04/17/brown-university-creates-a-mooc-for-high-school-students/]Brown”>Brown University Creates Online Course for High School Students - The New York Times)</p>