Wyoming Math 1.G.3a
The Standard
Partition circles and rectangles into two and four equal shares and: Describe the shares using the words halves, fourths, and quarters, and use the phrases half of, fourth of, and quarter of.
2023 Wyoming Mathematics Content and Performance Standards · Reason with shapes and their attributes.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students split circles and rectangles into two or four same-size pieces. They name the pieces halves, fourths, or quarters and describe one piece as half of, fourth of, or quarter of the shape.
What Mastery Looks Like
- A student can fold or draw lines that make equal pieces in either shape. They can shade one piece, name it, and explain why the pieces are equal.
Common Misconceptions
- Students may call any two pieces halves, even when one is larger. They may think fourths and quarters mean different amounts, or that a rectangle can only be split one way.
How to Assess It
- Give students a blank circle and rectangle. Ask them to split the circle into halves and the rectangle into fourths, shade one piece of each, and label the shaded pieces.
Lesson moves
Ways to Teach It
Give students paper circles and rectangles to fold into halves, then fourths, and have them shade one piece.
Show two rectangles cut into four pieces, one with equal pieces and one without, and ask, 'Which shows quarters? How do you know?'
Sort cards showing split circles and rectangles into three piles: halves, fourths, and unequal pieces.
Draw a rectangular pan of brownies, mark cuts for four equal servings, and label one serving 'quarter of the pan.'
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Printable 1.G.3a Worksheet
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