First Grade · Math · week 33

Halves: two equal shares

Partition a shape or set into two equal shares, called halves, and recognize unequal splits.

When you split something into two EQUAL shares, each share is called a half. Cutting a sandwich into two matching pieces gives you two halves -- but cutting it unevenly does NOT.

The word "equal" is the whole idea. Two pieces that are different sizes are not halves, no matter how you cut them.

📋 For the teacher
Teach it (10–15 min):
  • Fold paper shapes together and unfold to check that the two halves truly match.
  • Use real food, like a cracker or a sandwich, and cut it, checking with a ruler or by overlapping the pieces if unsure.
  • Say "equal" out loud constantly; it is the one word that makes a half a half.
  • Show a few unequal "trick" cuts and ask if they are really halves.
Talk about it:
  • What word matters most when talking about halves?
  • How many halves make a whole?
  • Can you find two different ways to cut a square into halves?

Mastery looks like: They correctly identify and create two equal halves, and explain why unequal parts are not halves.

Common stumbles: Accepting any two-piece split as halves without checking that they are equal; assuming there is only one way to cut something in half.

See it visually

Interactive, spoken-aloud tools that show this idea in motion.

DivisionShare fairly and build equal groups.try →
Homework for this lessonType it, write it with a stylus, or print it for pencil & paper.open →
Records attendance + 15 min of Math for this learner.
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