Montana Math MT.1.G.4

Math1st GradeGeometry

The Standard

Partition circles and rectangles into two and four equal shares. Describe the shares using the words: halves, fourths, and quarters.

2026 Montana Mathematics Content Standards

Teacher's field guide

What Students Need to Do: Students split circles and rectangles into two or four equal parts. They call the parts halves, fourths, or quarters.
What Mastery Looks Like: A student can draw two or four equal parts in a circle or rectangle and label one part correctly. They can spot parts that are not equal in size.
Common Misconceptions: Students may call two pieces halves even when one is bigger. Some think fourths and quarters mean different amounts, or that fourths must look like pizza slices.
How to Assess It: Give students a blank circle and rectangle. Ask them to split the circle into halves, split the rectangle into fourths, label one part of each, and give another name for a fourth.

Lesson moves

Have students fold paper circles and rectangles into two and four equal parts, then trace the folds and label each part.
Show a rectangle split into two unequal pieces and ask, "Are these halves? How can you tell?"
Give pairs six shape cards to sort into halves, fourths, and unequal parts, then have them explain one choice.
Use paper pizza circles and sandwich rectangles to show equal shares for two friends and then four friends.

Free download

$Preview of the MT.1.G.4 printable worksheet$

A ready-to-print activity worksheet aligned to MT.1.G.4, with an answer key for the teacher on its own page. No account needed.

PDF, US Letter, prints cleanly in black and white.

Keep exploring

Grade, subject, topic, and the complete standard are prefilled. Create one free, no account needed.