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Estimate and Measure Craft

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Estimate and Measure Craft

Year 3/4 Maths — Length Measurement

Student measuring with a ruler

📏 Part 1: Estimate First!

Before you measure, make your best guess. There are no wrong estimates — just think carefully!

Key Words: estimate = your best guess  |  measure = the actual length  |  cm = centimetres  |  mm = millimetres

1. Look at your wrist. How long do you think a bracelet strip needs to be to go around it?

My estimate: _________ cm    Because I think...

2. Now measure your wrist with a ruler or tape measure. What is the actual length?

Actual measurement: _________ cm and _________ mm

3. Was your estimate close? Circle your answer:

Yes, very close! (within 1–2 cm)

A little bit off (3–5 cm difference)

Quite different (more than 5 cm difference)

4. How much longer or shorter was your actual measurement compared to your estimate?

The difference was _________ cm. My actual measurement was:

longer than my estimate

shorter than my estimate

exactly the same

✂️ Part 2: Measure Your Craft Materials

Use your ruler to measure each craft material below. Estimate first, then measure!

5. Pick up a strip of paper or ribbon. Estimate its length, then measure it.

My estimate: _________ cm     Actual length: _________ cm _________ mm

6. Find a craft stick or cardboard piece. Estimate its length, then measure it.

My estimate: _________ cm     Actual length: _________ cm _________ mm

7. Look at the ruler below. What measurement is the arrow pointing to?

(Your teacher will draw a ruler marking on the board — write the measurement here.)

The measurement is: _________ cm and _________ mm

8. Which measurement word matches each meaning? Draw a line to match them.
centimetre (cm)
millimetre (mm)
estimate
measure
a small unit, 10 fit in 1 cm
use a ruler to find the exact length
a unit used for everyday lengths
your best guess before measuring

💭 Part 3: Reflect and Share

9. Why is it important to measure carefully instead of just guessing?
10. Check all the things you did well today:

I made a careful estimate before measuring

I used a ruler or tape measure correctly

I read the centimetres AND millimetres

I compared my estimate to my actual measurement

I used measurement words like centimetre and estimate

11. Draw your finished craft item in the box below and label one length on it.

Label the length like this: "This part is _____ cm long."

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