Visible Thinking in Mathematics is a series of eleven supplementary books that promotes critical and creative thinking in mathematics. It is designed to help make thinking visible by providing the child with opportunities to think, explore and reflect.

While practice leads to better performance, practice without contextual and conceptual understanding prevents the child from thinking critically and creatively. In this series, instead of learning procedures and formulas by rote, the child masters concepts through:

Thinking routines: functional questions to direct the child's thinking on key concepts and cultivate the child's thinking skills.

Parallel questions: consecutive mathematical problems with the same context but different key words to highlight differences between problems; ensuring that the child understands and retains concepts and skills better.

This approach not only instills in the child mathematical skills but also inspires discipline in thinking and greater motivation for learning.

Additional support is provided to the child through Notes. Notes present opportunities for parents and teachers to clarify misconceptions, simplify difficult concepts and address areas of difficulty for the child.

Above extract from Preface of Visible Thinking in Mathematics (reproduced with the permission of the publishers).

Answers are in the back of each book.

Note: This series has not been revised for U.S. usage. Currency images in the
money chapters at the lower levels are Singapore coins and bills. Also, only
metric measurement units are used.