University of Regina (Canada)
University of Regina: Math Central: Circle and Bar Graphs
Students evaluate data, use the data to make different types of graphs, and then investigate these graphs. Teacher's notes are included along with downloadable versions of the activity. This lesson is from a group of lessons that uses...
PBS
Wnet: Thirteen: Circle Graph Analysis and Creation
This site, which is provided for by WNET, gives a great way to practice using circle graphs through these exercises. One is analyzing a pie graph from the Census Bureau and the other creating pie charts using government data.