Instructional Video
Khan Academy

Khan Academy: Intuitive Sense of Probabilities

9th - 10th Standards
Think about what probabilities really mean. What does a probability of 0 mean? How about 1? [8:51]
Instructional Video
Khan Academy

Khan Academy: Intro to Theoretical Probability

7th Standards
An introduction to probability through the example of flipping a quarter and rolling a die. [8:18]