01012cam a2200181 4500 242148863 TxAuBib 20150910120000.0 150910s2012||||||||||||||||||||||||und|u 9780984838196 24.95 0984838198 24.95 TxAuBib Richardson, Kathy. How Children Learn Number Concepts : A Guide to the Critical Learning Phases. 2012. A "must-have" book for every educator wanting to know how young children develop an understanding of number concepts. Through her years of research and extensive work with young children, Richardson has identified the stages, or Critical Learning Phases, children go through as they develop mathematical understanding. This resource will help all math educators understand how children make sense of numbers and what mathematics they are ready to learn at each phase of development. Grades K-5. 20150910.