Do you recall my blog from a few days ago when I posed a question about Venn Diagrams? At that time, I noted that although the fundamental concept behind these little rapscallions is quite simple, I ...

This paper describes the use of a three-circle Venn diagram as a vehicle for introducing pre-service elementary teachers to pedagogical content knowledge (PCK). Each circle of the diagram represents ...

You've sat in so many meetings where Microsoft PowerPoint presentations have revealed unexpected truths. The presenter makes you marvel as she shows how the circle marked "profit" overlaps with the ...