The best there is! Saxon`s Math is the favorite of Homeschoolers because of its incremental approach. Instead of burdening the children with unreasonable amounts of work each day. Saxon`s Math introduces a new principle, gently repeats it in every lesson each day with 25 review problems of which 4-6 new problems are introduction. Over the course of a year watch your children`s comprehension and retention of basic principles increase, as well as their test scores soar. The kids really enjoy Saxon`s and feel a sense of achievement. Each level contains a textbook, tests, and an answer booklet. ( 5/4, 6/5, 7/6, and 8/7 are now new editions including a Solutions Manual in the Homeschool Kit. There are full step-by-step solutions to lesson problems and tests.) Solutions Manuals, beginning with Algebra 1/2 and up, are sold separately. Note: All Kits are Homeschool Kits, including the textbook, tests, and answer keys (again, books 5/4, 6/5, 7/6 and 8/7 kits include a solution manual in the homeschool kit price). The components are sold separately, if needed.