With summer on the horizon, many teens are looking forward to a break from school and tests. But for Sam Fuller of Albany, not much is going to change. Fuller is part of a rare minority of homeschoolers who call themselves "unschooled" — a more unstructured self-directed form of homeschooling. There are about 2 million registered homeschoolers in the U.S., a number that grows by about 10 percent a year. Sam's family can keep Sam and his brother home by registering their house as a private school.