Middle School Resource Interior Angles of a Triangle by Math Open Reference This interactive web page demonstrates the properties of the interior angles of a triangle. The page shows a triangle where the user can drag the vertices to reshape it. As it is being changed, the angles are continually updated, along with an expression […]

Elementary School Resource Definition of a Point by Math Open Reference This web-based resource provides a definition of a point, a practice exercise for moving points, and links to other pages within the website that provide information on coordinate geometry. This interactive application can be enlarged for use on a classroom projector. All materials found […]

High School Resource Domain Representations by Illuminations Students use graphs, tables, number lines, verbal descriptions, and symbols to represent the domain of various functions. Related NY State Academic Standards: Math.MP.5, Math.MP.7 Be sure to check out our Educational Resources, featuring thousands of activities, lesson plans, constructed-response questions, rubrics, teacher resources, multimedia, and more!