1.1 Place value, estimation and rounding

Core concept 1.1 covers the structure of our place-value system (particularly as it relates to decimals) and rounding numbers to a required number of decimal places or significant figures.

Secondary KS3
Mastery PD Materials
1.1 Place value, estimation and rounding

The first document below breaks the entire core concept down into smaller ‘key ideas’, and also identifies the prior learning from KS2 necessary for students to make progress within this KS3 area of maths.

Underneath are resources and videos from several other areas of the NCETM website. Some include materials for use in the classroom. Others are solely for professional development purposes, either alone or with colleagues. And right at the bottom is a subject knowledge audit you can download to assess your own knowledge of this core concept.

The video below is the first in a playlist of two videos related to the teaching of this core concept. Click on the dropdown option below to view the other available videos. If you wish to download any of the videos, you can do so from the Vimeo showcase


These feature articles may also be useful when planning to teach this core concept:

Check your subject knowledge

If you are new to teaching maths, or would just like to brush up on some areas of the KS3 curriculum, this will help you check your knowledge in this core concept area.