Some Triangles, All Triangles

Students distinguish between examples and non-examples of triangles and justify reasoning based on defining attributes.

By Amplify Classroom

Grades: 1st Grade

Subject: Math

Learning goals: Today’s Goals • Draw and identify triangles. • Language Goal: Justify if a shape is a triangle by reasoning about its attributes. (Speaking and Listening) Materials Lesson Resources: Activity 1 PDF; Classroom materials: straightedges, Words to Describe Flat Shapes chart (from prior lessons)