With four levels of difficulty, this online jigsaw puzzle is a great brain-teaser for students of any age.

Puzzles are a great way to work on math skills like shapes and organizing -- and this online puzzle is a great tool for kids of all ages and skill levels.

Kids must piece together this artsy puzzle, featuring painter Floyd and his muse.

It's a number conga line! Kids flex cognitive skills and learn numbers with this puzzle.

Students click on all the things that look wildly out of place in this classroom scene.

Kids must compose a square from smaller shapes in this tangram game.