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⚖️ Weighing and Measuring

Grab some cubes and a scale! Learn to measure how long things are by lining up cubes, and to weigh things to see what is heavier and lighter.

lessons

~30 min

to learn

🔢 Math

subject

Ages 6–12

level

Start the course →

What you’ll learn

Measuring How LongMeasure length by lining up and counting cubes, and order objects from shortest to longest.We can measure how long something is by lining up cubes next to it and counting them. A pencil might be 5 cubes long and a crayon 3 cubes. More cubes means longer, so we can compare and order objects from shortest to longest.
Weighing on a ScaleUse a balance scale to compare weights, knowing the heavier side goes down, and sort heavy and light objects.A balance scale has two pans and shows which thing is heavier: the heavier side sinks down and the lighter side rises. An apple is heavier than a grape, so the apple side drops. Heavy things (a watermelon, a book) and light things (a leaf, a feather) can be sorted apart.
Comparing and Measuring TogetherSee how weighing and measuring are used in real life, and compare which of two things is heavier.Weighing and measuring help every day, like using a kitchen scale to weigh fruit for cooking. We can compare weights by thinking about which thing is harder to lift: an elephant is heavier than a mouse, a pumpkin heavier than a pea.

Questions this course answers

You line up cubes next to a pencil and count 5. How long is the pencil?

You counted 5 cubes along the pencil, so it is 5 cubes long.

The pencil is 5 cubes and the crayon is 3 cubes. Which is longer?

5 cubes is more than 3 cubes, so the pencil is longer.

When we order things shortest to longest, which comes first?

Shortest to longest starts with the shortest thing.

On a balance scale, the heavier side...

The heavier side is pulled down while the lighter side rises up.

We put an apple and a grape on a scale. The apple is heavier. Which side goes down?

The apple is heavier, so the apple's side sinks down.

Which one is heavy?

A watermelon is big and heavy, unlike a light feather, leaf, or cotton ball.

Grounded in trusted sources

PBS Kids — early math
Khan Academy Kids
NAEYC — early math learning

Every Wunder lesson is built from real, reputable sources — never invented.

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