This site discussing using tables to represent data.
http://www.shodor.org/interactivate/discussions/pd6.html
You can explore Example 9 by playing with this interactive site called The Monty Hall Dilemma:
https://math.andyou.com/tools/montyhallsimulator/montysim.htm
There is an introduction to probability at this excellent site:
http://mathforum.org/dr.math/faq/faq.prob.intro.html
Here is an interactive coin-flipping site:
https://www.random.org/coins/
Here is an interactive site for rolling one or more dice.
https://www.random.org/dice/
This site asks the question, “Can you predict what happens next?” It gives a nice introduction to random choices.
http://polymer.bu.edu/java/java/winning/WinningStreak.html