1.G.A.3 — Partition circles and rectangles into two and four equal shares; describe halves and quarters.

What this standard asks students to do

1.G.A.3 is a 1st grade Common Core standard in the Geometry strand. It asks students to: partition circles and rectangles into two and four equal shares; describe halves and quarters. Teachers typically address it during the reason with shapes and their attributes cluster, alongside the related standards listed below. FoxFish generates printable worksheets, auto-graded quizzes, and flashcard sets aligned to this standard in seconds.

Sample questions aligned to 1.G.A.3

1. Example 1

   Cut the rectangle into 4 equal parts. What is each part called?

2. Example 2

   Color half of the circle.

3. Example 3

   How many quarters make a whole?

Want a full worksheet? Generate 20 problems aligned to 1.G.A.3.

Common student mistakes

Build distractors and reteach prompts around the errors students actually make on this standard.

• 1Rushing to an answer without showing the work with pictures or manipulatives — 1st-grade students who skip this stage often can't debug their own errors.
• 2Mis-identifying what the prompt is actually asking. On 1.G.A.3, teachers see students latch onto surface keywords and pick the wrong operation.
• 3Applying a memorized procedure to a case where it doesn't fit — the classic geometry trap when problems change form (e.g., Cut the rectangle into 4 equal parts. What is each part called?).

Teacher FAQ

Related standards in this cluster

• 2.G.A.3Partition circles and rectangles into two, three, or four equal shares; describe shares using halves, thirds, fourths.

Teacher guides for 1.G.A.3

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