- 34 levels based on Montessori Math Materials - 434 pages (PDF format) - Student Answer Key (for practice levels) - Teacher Answer Key (for assessments) - Perfect for ability-based instruction - Easy to implement and differentiate - Ideal for 2nd, 3rd, 4th grade - Each level comes with a 10 question "mastery" assessment for progress monitoring - Successfully integrated at a public Montessori school for over 10 years