Index -> Resources -> Mathematics -> Puzzles

Puzzles make great lesson fillers and for stretching the most able. The internet provides a rich source across the range, below TagTeacherNet.

Brain Teaser

Brain Teaser is a great American puzzle site with a variety of weekly puzzles aimed at different levels.

Grades 3-4 = KS2
Grades 5-6 = KS2 / KS3
Grades 7-8 = KS3
Nrich

Nrich is an excellent Cambridge University resource designed to stretch able pupils and is a rich source for educators. Regular puzzles cover the range.
MathPuzzle.com

MathPuzzle.com aims to do for the web what Martin Gardner did for books. Extensive site with weekly puzzles.
Thinks.com

Thinks.com is a comprehensive puzzle site with many interesting links. Features maths puzzles but contains a variety of links to general brain teasers.
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Ponder this...

A-Level standard puzzles at this site. Not for the faint hearted though!