The experts at The Princeton Review have been helping students, parents, and educators achieve the best results at every stage of the education process since 1981. The Princeton Review has helped millions succeed on standardized tests, and provides expert advice and instruction to help parents, teachers, students, and schools navigate the complexities of school admission. In addition to classroom courses in over 40 states and 20 countries, The Princeton Review also offers online and school-based courses, one-to-one and small-group tutoring as well as online services in both admission counseling and academic homework help. I. Edward Alcamo, Ph.D., formerly of the State University of New York at Farmingdale, taught biology for over thirty years, specializing in biology for health science students. He has been honored for excellence in teaching by the State University of New York and the National Association of Biology Teachers.