Oswego City School District
Regents Exam Prep Center: Working With Sets and Venn Diagrams
This Oswego City School District site gives an explanation of Venn diagrams, then uses a word problem to show how Venn diagrams can be applied to solve algebraic equations.
University of St. Andrews (UK)
University of St. Andrews: History of Set Theory
This page, which is provided for by the University of St. Andrews, traces the history of Set Theory as well as the concept of infinity and the infinite set.