Wolfram Research
Wolfram Math World: Sets
This page discusses sets and set theory in mathematics and probability, and it discusses the notation and properties of sets.
Oswego City School District
Regents Exam Prep Center: Set Builder and Interval Notation
Use this lesson, practice exercise, and teacher resource when planning instruction on sets and interval notation. Offers simple definitions and examples, an eleven-question online quiz, and a .pdf worksheet for students to complete while...