The Ministry is migrating nzmaths content to Tāhurangi.           
Relevant and up-to-date teaching resources are being moved to Tāhūrangi (tahurangi.education.govt.nz). 
When all identified resources have been successfully moved, this website will close. We expect this to be in June 2024. 
e-ako maths, e-ako Pāngarau, and e-ako PLD 360 will continue to be available. 

For more information visit https://tahurangi.education.govt.nz/updates-to-nzmaths

“We were having difficulty with a couple of students in year 2/3 trying to understand teen numbers.....”

The value of representing teen numbers on number lines both horizontally and vertically is highlighted here.
We may inadvertently create confusion by particular numeral representations on horizontal number lines.

Domain: Place value
Transition: 2 → 4
Barrier: Difficulty with teen numbers.

Other resources:

Material Masters: