This tutorial provides definitions and examples of ratios and proportions and features comparing ratios and converting rates.

This interactive exercise focuses on determining probabilities associated with repeated coin tosses and building tree diagrams to take math out of the classroom and into the real world.

No matter what your favorite card game is, we all wish we could use psychic powers to draw the card we want on our turn. You may not have psychic powers, but you might have the power of probability on your side. Do this experiment and...

This interactive exercise focuses on determining probabilities associated with repeated coin tosses and building tree diagrams to take math out of the classroom and into the real world.

This site defines a percent, explains it as a fraction and decimal, and shows how to estimate a percentage.