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Utah St. Univ.: Coin Tossing Applet
An interesting Applet that simulates the toss of a coin 100 times. A quick count of the results and an accompanying graph make this site useful for both teacher and student.
National Council of Teachers of Mathematics
Nctm: Figure This: Combination Locks
If you're good with numbers, then here's a challenge just for you. See if you can figure out how many three number combinations you can make using numbers from 0 to 39. A probability challenge that explores number arrangements. Taken...
National Council of Teachers of Mathematics
The Math Forum: Against the Odds Lesson Plan
Teachers can find ideas for their probability lesson plans here. For example, there is an interdisciplinary unit dealing with disabilities and probability as well as one using a field trip to Sea World.