Created by the Little River Montessori School Owner/Administrator who has worked in the Montessori education world for almost 20 years.*Aligns with Montessori Research and Development Curriculum*Upper Elementary Mathematics and Geometry Lessons Quick Reference Guide includes pictures of each lesson, a web link to a sample presentation video (available in digital format only), Montessori Research and Development text book introduction page number, sample problems, and/or suggested essential vocab