This updated manual prepares California high school students, ages 16 and older, to take the test that gives them the equivalent of a California high school diploma. Passing the test also makes them eligible for community college admission, even if they lack a high school diploma. The book presents two full-length model exams plus a diagnostic test to pinpoint weaknesses. All test questions are answered and explained. Subject review chapters cover basic writing skills, reading comprehension, and mathematics, including arithmetic, algebra, graphs, measures, and plane geometry.