Stem and leaf plot

A Stem and Leaf plot is a statistical digram in where there is a chart where the first digit is in the first column, and all other digits next to that digit are the next digits. For example, say we have a list of scores, 21, 28, 42, and 88. The Stem and Leaf plot for this would be 2|1 8

             4|2
             8|8.

This has a lot of helpful ways and appears in Mathcounts frequently.