standard_description: Recognize angles as geometric shapes that are formed wherever two rays share a common endpoint, and understand concepts of angle measurement:
- 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.
- An angle that turns through n one-degree angles is said to have an angle measure of n degrees.
problem_activity: Stage 3: Find Shapes
Required Preparation
Materials to Gather
Picture books
Materials to Copy
Blackline Masters
Picture Books Stage 3 Recording Sheet

Narrative
Students look through picture books and notice and describe shapes they see in the pictures.
Variation:
Students may record the shapes they see with drawings or words.
Additional Information
Each group of 2–4 needs at least one picture book that shows a variety of shapes throughout the book.


aligns: no