Purple Math
Purplemath: Stem and Leaf Plots
Explains how to create a stem-and-leaf plot from a data set. Demonstrates how to format a clear stem-and-leaf plot.
PBS
Pbs: The Lowdown: Living Wages in Ca: Ratio and Rate in the Real World
In this KQED infographic, find out how much an adult in different-sized households needs to make to pay for basic monthly living expenses. In the accompanying classroom activity, students solve real-life problems involving rate and ratio...
National Council of Teachers of Mathematics
Nctm: Illuminations: State Names
Students use multiple representations to display how many times the letters of the alphabet is used in a state name. Concepts explored: stem and leaf, box and whisker plots, histograms.