Currently almost two million children are homeschooled in this country. The fastest growing segment of this homeschool population are teens. Kids who learn at home consistently outperform their schooled peers on standardized tests, including the ACT test (a reliable indicator of future college success), and are welcomed at just about every college and university.
Many teens who had difficulty in school do exceptionally well as homeschoolers. Once they are no longer subjected to the peer pressure, negative influences, mindless busywork, and hours of homework, these kids thrive. For more resources and helpful advice, please read Homeschooling Teens and Leaving School and Learning at Home. You'll also find Cafi Cohen's book, Homeschooling: The Teen Years to be very helpful. Good luck!