Grade
1

Guess My Rule: Shape Shares

Inside the circle: a rectangle divided into thirds. A square divided in half. A circle divided into fourths. A triangle divided in half. Outside the circle: a triangle divided into 2 (1 big, 1 small). A rectangle divided into 4 parts (2 big, 2 small). A square divided into 2 parts (1 big, 1 small). A circle, divided into 3 parts (2 the same, 1 different).
  1. Some shapes belong in the blue circle, and some shapes do not. What is the rule to be in the blue circle?
  2. Draw at least one more example that belongs inside the blue circle.
    You can draw lines on the shapes below or draw your own.
A square, a rectangle, and a circle, with room for students to draw in another shape.
  1. Draw at least one more example that belongs outside the blue circle.
    You can draw lines on the shapes below or draw your own.
A square, a rectangle, and a circle, with room for students to draw in another shape.

Each shape is split into shares, or parts. What do you notice about the shares?

Make your own rule using shapes. You can use the circle below or draw your own.

Write some examples that belong inside your circle and some examples that belong outside your circle.

An empty circle, with the heading 'Rule for my circle.'
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Reference for Educators

Sample problems and solutions