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In this activity, learners create a mind and math puzzle that requires a three-dimensional solution.

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.

In this online game, learners build complicated machines to complete simple tasks. The game starts with a power source on one side of the screen and the task on the other side.

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

In this online game, learners run an outer space drink stand and thirsty alien customers are on the way.

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.

In this online puzzle game, learners need to choose a path from a starting number to a goal number. Along the path are simple operations (e.g.

In this web-based activity, learners try to figure out who in an online chat room has their matching puzzle piece.

In this activity, learners construct three math puzzles out of simple materials like wood, string, and Styrofoam.

In this outdoor activity, learners cut through and investigate rotten logs and then make log-profile puzzles for each other.

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