Need a fun solution to teaching ... solutions? A series of puzzles provides reinforcement to key molarity terms and calculations. Science scholars determine the concentration of several solutions before using the information to solve...

A collection of Math brain teasers.

Think logically as your solve the brain teasers provided on this page. Test your own logic skills with the puzzles that you can sort by popularity and difficulty, and test others' logic skills by submitting your own puzzles.

Features great games to wake up the brain. Test your knowledge of words, numbers, vocabulary, and more while having fun.

Interactive brain games that challenge thinking and creativity skills.

Sharpen your logical thinking and see if you can figure out the strategy to get to the target number before the computer.

A small collection of 20 or so math brain teasers and word problems, in Spanish. Challenging for younger students -- they use math skills up to multiplication.

Find thirteen ways to show one half by solving this brain teaser from Cyberchase.

This lighthearted personal website (Exidor is a character from the old "Mork and Mindy" TV show) provides a multitude of logic puzzles and brain teasers, along with links to similar sites. Solutions provided for each puzzle.