Continuing with our ongoing theme of sharing the guidance documents that we are producing to support the new Highland Numeracy Progression Summary Documents, today will look in more detail at the document on subitising.
We frequently see the perception that subitising is just about recognising how many dots are on a five frame or tens frame or perhaps in an irregular pattern with the goal being just to know how many dots there are. There is so much more to subitising than this and through rich discussion important mathematical ideas including can be developed including but not limited to: spatial awareness, estimation, patterns and relationships, mathematical properties and relational thinking.
The guidance document explores subitising in more depth including distinguishing between two types of subitising:
- Perceptual Subitising
- Conceptual Subitising
As well as subitising in different ways including: spatial, temporal and kinaesthetic subitising.
We also explore ways in which conceptual subitising can be used to support a range of different ideas including:
- Composition and Decomposition
- Addition and Subtraction
- Basic Facts
- Place Value
- Multiplication and Division
We discuss how subitising can be made more or less complex depending on the types of arrangements used.
We also discuss common misconceptions and things to look out for.
And finally, there is further exemplification of some of the ideas that subitising builds the foundations for.
Regardless of whether subitising is something new to you or you are very knowledgable about it already, we hope there is something in the document to start you on your journey or an idea that you hadn’t considered before that gets you thinking.