Saxon Math for Homeschoolers: 7 Important Things to Know ... 1. How do Saxon Math levels work? Saxon Math is graded K, 1, 2, and 3 for kindergarten through third-grade students. After third grade, the textbooks switch to skill level instead of grade level. Thus, Math 3 is followed by Math 5/4 , which is for advanced fourth graders or for average fifth graders.