Estimate and measure length and record results in a table | Maths

Starter quiz

Which object measures about 1 cm?

A teddy bear

A ladybird ✓

A glue stick
Which object measures about 10 cm?

Paper ✓

Paperclip

Button
Which is the best estimate for the length of this playdough snake?

9 cm

7 cm ✓

5 cm
Which of these has used '5 and a bit' correctly to estimate the length of this playdough snake?

I estimate that this snake is about 8 cm long because 5 and 3 is equal to 8 ✓

I estimate that this snake is about 7 cm long because 5 and 2 is equal to 7
I think that a good estimate for the length of this block is ___ cm.

8

7

6 ✓
I think that a good estimate for the length of this feather is ______ cm.

'8' ✓

Exit quiz

Which of these is the best estimate for the length of this leaf?

6 cm

8 cm ✓

10 cm
Choose the best heading for this part of the table.

length

object ✓

leaf
Alex says, 'I think this leaf is about 6 cm long.' Is this an estimate or a measurement?

estimate ✓

measurement
Jun says, 'This leaf is 5 cm long.' Is this an estimate or a measurement?

estimate

measurement ✓
Look at the table. For which object was the estimate and measurement the same?

'stick' ✓
Look carefully at the table. Which sentences are correct?

The stick is longer than the feather.

The leaf is the shortest object. ✓

The estimate and the measurement for the leaf are the same.

The feather is the longest object. ✓

Worksheet

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Lesson Details

Key learning points

When you estimate length, you think carefully and make a sensible guess.
When you find a measurement, you use a ruler so it is more accurate.
Estimates and measurements can be recorded in a table.
Information in a table can be used to describe and compare lengths.

Common misconception

Children may try to estimate length without aligning their object with the start of the known length (such as a 10 cm strip of paper).

Each time you make an estimate, model aligning the object you are measuring with the start of the strip of paper. Make links to when we measure with a ruler, knowing we always have to line up the object we are measuring with 0 cm.

Keywords

Estimate - To find a value that is close enough to the right answer, usually with some thought or calculation involved.
Measure - To find a number that shows the size or amount of something.
Table - Information arranged in rows and columns.