Cut the Knot
Cut the Knot: Probability Questions
This site defines probability and has a computer-based random number generator. The site has links to more than 100 probability problems which require some prior statistical knowledge to solve, or they can be great "openers" for teachers...
CK-12 Foundation
Ck 12: Probability: Definition of Probability
[Free Registration/Login may be required to access all resource tools.] Understand and define probability in terms of ratios.
CK-12 Foundation
Ck 12: Probability: Definition of Probability
[Free Registration/Login may be required to access all resource tools.] Recognize and calculate simple theoretical probability.
Interactive Mathematics
Interactive Mathematics: Probability of an Event
The definition and properties of probability are given along with examples of how to find the probability of an event. Links are included for interactive probability games involving birthdays and the lottery.
University of Georgia
University of Georgia: Inter Math: Probability
This InterMath site gives a description of probability along with an example. Be sure to follow the links to related terms, everyday examples, challenging problems, more information, and the interactive check point involving probability...