National Council of Teachers of Mathematics
Nctm: Illuminations: Mean and Median
This applet allows the user to investigate the mean, median, and box-and-whisker plot for a set of data that they create.
Shodor Education Foundation
Shodor Interactivate: Mean, Median, and Mode Discussion
This is a virtual discussion between a mentor and student involving mean, median, and mode. Discusses when each is used and how they are found.
Better Lesson
Better Lesson: What Does the Data Tell Us? Describing Data
Understanding how to interpret data by its shape, spread, and center helps students to understand statistics.