When Susan Richman called the College Board in 1992 to ask if her son Jesse could take Advanced Placement tests as a home schooler, a staff member responded that no one had ever asked him that question, but then assured her that home schoolers were welcome to take the tests. Ms. Richman went on to coach Jesse for so many AP exams that he started college with 12 AP credits. That experience also gave the Richmans who live in Kittanning, Pennsylvania, an idea that eventually put them at the front of a home-school trend. She and her husband, Howard Richman, went on to develop a thriving business that offers online AP test-preparation classes for home schoolers. Their company, PA Homeschoolers, has been providing the classes for 10 years and now serves 227 home schoolers who are preparing for any one of the 14 AP exams in subjects from music theory to computer science. Just as enrollment in PA Homeschoolers classes has grown steadily, so has the overall number of home schoolers nationwide who are taking AP exams. (Contains 1 graph and 1 table.)