Curated OER
Even and Odd Numbers Closure Activity
Students explore the concept of closure. In this closure lesson, students discuss what it means for something to be closed by using examples of juice and gases. Students add and multiply combinations of even and odd numbers to...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Closure
Dr. Math explains the algebraic concept of closure. Dr. Math gives several examples and explains why the set is closed under the operation or not.