Shodor Education Foundation
Shodor Interactivate: Lesson: Venn Diagrams
The lesson plan, with objectives, lesson outline, and an interactive Venn diagram shape sorter, takes students through an examination of Venn diagrams.
National Council of Teachers of Mathematics
Nctm: Illuminations: Shape Sorter
Students learn how to categorize plane figure polygons using Venn Diagrams with this computer based tool.