think! Mathematics Primary Singapore Edition Textbook 3B is a series of textbooks and workbooks written to meet the requirements for Singapore's latest curriculum.  Written in accordance with extensively researched approaches used in Singapore, it adopts a spiral design with the integration of the concrete-pictorial-abstract (C-P-A) approach, careful variation and the use of problem solving, which are integral features of the learning process. 
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Based on time-tested learning theories, this series incorporates the use of concrete manipulatives and group work.  In think! mathematics Singapore Edition, these features are exemplified throughout the series