Gaps and Misconceptions in Maths

a Learning Diagnostic and Teaching Tool

Subtraction Image - Numicon

With Numicon place the tiles one on top of the other so that the ‘difference’ is clearly visible...

Subtraction Image - Jotting

...and then describe as...

“5 is one more than 4”

“4 is one less than 5”

“The difference between 4 and 5 is 1”

Model the number sentences:

4 + 1 = 5

5 — 1 = 4

5 — 4 = 1

This image is referred to in these Probing Questions

Babcock LDP