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In this activity, learners construct a simple game to test their hand-eye coordination and steadiness of hand.

In this online brain stumper, the bottom half of a series of letters is covered. You may think you know what it says, but remove the black bar to see if you're right.

This activity has three story puzzles learners can solve to learn about life in the Arctic.

This puzzle provides an interesting context which challenges learners to apply their knowledge of the properties of numbers.

In this Cyberchase activity, learners use the numbers one through six to solve a puzzle.

In this number puzzle/trick, learner #1 thinks of a number between 1 and 63. Learner #2 shows learner #1 six cards and asks them whether the cards contain their number.

Learners compare a life-size drawing of a Tyrannosaurus rex head and a full-size Sinornithosaurus body to understand that dinosaurs varied in size.

In this activity, learners use tangrams ( 7-piece puzzle tiles) to assemble a variety of shapes. Tangrams are ideal for improving spatial reasoning and geometry properties.

In this math activity, learners create a magic turtle where all the rows, columns and diagonals add up to fifteen.

In this activity (on pages 55-66 of PDF), learners fold paper into origami shapes and then combine several identical shapes into a three-dimensional structure.

In this activity, learners find as many combinations of a hundred as they can using various puzzle pieces from a hundred square grid paper.