CRCTLessons: Jeopardy (flash)

KhanAcademy: Counting Principle

MathGames: Counting Principle

PBS: Tree Diagrams

IXL: Certain, Probable, Unlikely, Impossible

KidsMath: Probability (flash)

ThinkCentral: Pulls From a Bag (flash)

CRCTLessons: Jeopardy (flash)

FuelTheBrain: Bathtub Battle (flash)

IXL: Probability

IXL: Probability 2

MathPlay: Probability-Game (flash)

XPMath: Starfish (flash)