Another great title from Scholastic. Detailed description coming soon.
Common Core Alignment:
4.MD.C.5a An angle is measured with reference to a circle with its center at the common endpoint of the rays;by considering the fraction of the circular arc between the points where the two rays intersect the circle. An angle that turns through 1/360 of a circle is called a “one-degree angle,” and can be used to measure angles.