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If two minuses make a plus, why don’t two pluses make a minus? Is there a formula for factorial? And why isn’t pi a whole number? In this collection of over 40 articles from the journals Mathematics in School and Symmetry Plus, Colin Foster takes Questions Pupils Ask about mathematics as his starting point for a series of reflections on learning and teaching secondary mathematics.
Also included are articles addressing a diverse array of mathematical topics, spanning number, algebra, geometry and statistics, and involving puzzles, applications of mathematics to daily life and tasks to take into the classroom.

More from Colin Foster: Flowchart Investigations

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"Covering a diverse range of topics including number, algebra, geometry and statistics, each essay is thought-provoking, engagingly written, and accessible for KS3 and 4 students, as well as teachers."

Reviewed by Teach Secondary

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