This unique, easy to use The Classics Protractor is a full circle and features 360 degrees of measuring capabilities. You can take it anywhere by easily storing it in your binder, backpack, or briefcase. The Classics school, office and art supplies are useful, high quality items that are great for school, home and offices. They are available in assortments of bright, vibrant colors and integrate both new unique ideas with traditional must haves.
Our fourth grade math curriculum uses circle protractors to teach the measurement of angles. Unfortunately, this protractor measures angles in a counterclockwise fashion, which is the opposite of the circle protractors in the math series. I'm not sure why the protractors would be labeled this way.