In this Desmos activity, students complete three rounds of estimation challenges. After each initial estimate, they view a dot plot of their classmates’ responses and decide whether (and how) to revise their estimate. Common strategies include “moving toward the middle” (i.e., median). At the end of the activity, students consider a new (heavily skewed) dot plot and decide whether the mean or median is a better measure of center.

Note: This activity works best with 10 or more students.