Saxon's Math Intermediate 5 can be used in place of Saxon Math 6/5. Saxon Math 6/5 is designed for students in grade 5, or grade 6 students who are struggling with math. Saxon's incremental lessons provide daily practice and assessment in a "spiral" format; mathematical concepts are taught through informative lessons, diagrams, interactive activities, and investigations that build critical thinking as well as real-world problem solving skills. Saxon Intermediate 5 includes 12 sections, 120 lessons and 12 "investigations. "