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BrainBashers - brain teasers, puzzles, riddles, and more
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Brain Teasers I – a brain teaser a day (not all appropriate)
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Brain Teasers II – a brain teaser a day (not all appropriate)
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Brilliant – solve and discuss thousands of problems
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Daily Skyscrapers – my favorite BrainBasher game
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Feynman – long division puzzles
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Hersam – brain teasers
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Mathematics Contest Archive – from Waterloo
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nRich – specialists in rich mathematics
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Project Euler – 454 number problems
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Problem of the Day Archive – University of Waterloo
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Question of the Day – mixed bag
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TestFunda I – puzzle of the week
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TestFunda II – puzzle of the week
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TestFunda III – puzzle of the week
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Vur@li’s Blog – brainteasers and puzzles
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Would You Rather? – asking students to choose their own path
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Three-Act Math Tasks – from Dan Myer
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World’s Hardest Easy Geometry Problem – easy to start …
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TIMES Modules – from Australian curriculum
Resources
Explore the Building Thinking Classrooms Resources below for insights into the framework, companion guides and resources, tips for implementation, and inspiration: