Math · Stage 1
How Long? Measuring & Comparing Length
Line up same-size units, count them, and compare — longer, shorter, taller.
✦ Math📘 Stage 1 · S1⏱ ~8 min🧒 Ages 5–6★ Free to start
measure length in same-size units and compare using longer, shorter, and taller.
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Kavi Measures with Cubes 🧊
Kavi found a pencil and a crayon and asked, "Which one is longer?" Looking was tricky — so Kavi lined up little same-size cubes under each one, starting right at the end. The pencil was 7 cubes long. The crayon was only 4 cubes. "7 is more than 4," said Kavi, "so the pencil is longer!" When the units are all the same size, counting them tells you how long something is.
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What your child will learn
1Measure with same-size unitsA ruler is a line of same-size units. Lay your object so its end lines up with 0, then count the units to the other end. Hop along to see how we count the units: 1, 2, 3 …
2Longer or shorter?Measure both with the same unit, then compare the counts. Tap each card.
3Sort tall and shortSome things are tall, some are short. Tap the right box for each one.
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A peek inside
A straw lines up with 6 cubes and a twig lines up with 9 cubes (same-size cubes). Which is longer?
9 cubes is more than 6 cubes
Try this at home: A red ribbon is 8 cubes long. A blue ribbon is 5 cubes long. Which is longer? __
Ready to play and learn?
Start the free interactive lesson, or print the handout for screen-free play.
Part of Math · Stage 1 · S1 on KAVI Academy — a secular, whole-child learning platform for ages 5–12.