This is the book series you want to use to study. I teach in a GED program. Steck Vaughn wrote the test we currently give until 2014. It pays to use this book if only to get familiar with the format of how the questions are asked and what the tester, Steck Vaughn, is looking for in an answer. We have these five books and this will be for my personal use, mainly at home, where I often spend time on lesson plans. I teach reading, language, and math the most. Contemporary has a good beginning math series, especially Power 1 and 2, but eventually you need to get to math level that is expected when you learn from Steck Vaughn books. We always begin in the reading book; because, if you cannot read and interpret the questions you can not learn what you need to pass the GED exams in any other subject. If a student needs a more simple text for basics then I do recommend the Contemporary group, but then that student must graduate to the Steck Vaughn Series.