2D Shapes

Angle Representer

Sub Trajectory: parts

Represents various angle contexts as two lines, explicitly including the reference line (horizontal or vertical for slope; a “line of sight” for turn contexts) and, at least implicitly, the size of the angle as the rotation between these lines (may still maintain misconceptions about angle measure, such as relating angle size to the length of side’s distance between endpoints, and may not apply these understandings to multiple contexts).

Activities

You may see this:

Other Examples:

Children identify the measure of an angle by using plastic straws.
Children draw the angle under a ramp they have built (from the floor under the ramp to the bottom of the ramp) and a wider angle over the ramp (from the floor in front of the ramp to the top of the ramp).

Help your student become a(n) Angle Representer

Activities and experiences throughout the day challenge children to understand the many contexts that involve all the attributes of angles. That is, angles have two rays, and so children can explicitly include the reference line (horizontal or vertical for slope; a “line of sight” for turning such as along a road) and the size of the angle as the rotation between these lines.

Make me Double

Small Group

As the World Turns [Angle Representer]

Whole Group