Kindergarten Fall Math — Counting to 100, Subitizing, Cardinality, Shapes, and Pattern
Math · GM K math.gK.f.gm.shapes_2d

Identify, name, and describe 2D shapes (circle, square, triangle, rectangle, hexagon, oval) by attributes

Name 2D shapes regardless of orientation or size. Describe shapes using attributes: number of sides, number of vertices (corners), curved vs. straight sides, equal-side property (for square, equilateral triangle). Identify shapes in real-world objects (wheels, doors, signs).

Mastery threshold
90%
Min instances
14
Typical minutes
25
Spaced intervals (days)
1, 3, 7, 14, 30, 60
Prereqs

No prereqs — this is an entry skill.

Successors
Common misconceptions
  • Identifies a square only when oriented with horizontal base; does not recognize a rotated square as a square (calls it a 'diamond').
  • Calls all 3-sided shapes 'triangles' regardless of whether they are closed (accepts open figure with 3 line segments).
  • Cannot recognize a large triangle as the same shape as a small triangle (over-attends to size).
  • Confuses oval (closed curve, no vertices, elongated) with circle (closed curve, equidistant from center).

Exercise pool (5)

Diff Stem Type
2 Reach into the bag without looking. Feel ONE shape. Count its sides and corners with your fingers. Name the shape. feel and name
3 I am thinking of a shape. It has 3 sides and 3 corners. What shape is it? attribute describe
3 Look at this classroom photo. Find and circle 1 example each of: circle, square, triangle, rectangle, hexagon, oval. find in picture
3 Write the name of each shape below it. (Choose from: circle, square, triangle, rectangle, hexagon, oval.) label shapes
4 Look at all 4 shapes. Are they all squares? (One is rotated 45 degrees — it looks like a diamond.) Explain your answer. rotation invariance