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Math Vocabulary: Perimeter

Math vocabulary word of the day: perimeter!


Why is it that we oft forget the importance of math vocabulary? In reading instruction, it is always included as part of the programming but often in mathematics instruction, it is breezed over.

Neurodiverse students especially need to be taught directly the roots, prefixes, and suffixes not only in everyday reading but in math vocabulary too! This is called Morphology.

What Is Morphology?

Morphology, a word of Greek origin, combines “morphe,” meaning form, and “ology,” meaning the study of. Morphing creates mental pictures of children’s toys such as LEGO™ bricks that click together to create new forms beyond a rectangular prism.


Building a Spaceship!

Morphology works in much the same manner, with students manipulating the parts of words to create new meanings or altered, but similar, meanings.

Below in this video, we’re studying the word ‘perimeter’. 

Do you know where the word Perimeter comes from?

Click to watch this super quick video!

Tap for Video Transcript Here


peri –
Comes from Latin and Greek meaning “around, about”.

We can walk ‘around‘ the soccer field.

Draw ‘around‘ the hexagon.

Comes from Latin and Greek meaning“ to measure”.

‘Measure’ the paper.

What do you think perimeter means? Let’s look at other words that have the peri- in them.

Peri means ‘around’ and style is ‘column’
There are columns ‘around’ the fountain and grass.

Peri means ‘around’
Scope means ‘to view’

What do you think perimeter means?

This square has sides of 5 feet.

Let’s measure around the square.

5 feet plus 5 feet plus 5 feet plus 5 feet. That’s 20!

The perimeter is 20 feet.

Perimeter – to measure around.

Ready to start your multisensory math intervention saga?

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Watch the demo to learn how to get started with your math specialist today!