The aim of this session is to share with you how we teach number - PowerPoint PPT Presentation

The aim of this session is to share with you how we teach number calculations in KS2, so that you are then confident in supporting your child at home.

KS2 number calculations  Mentally adding and subtracting numbers  Column addition and subtraction (Year 3/4)  Short multiplication (Year 4)  Long multiplication (Year 5)  Short division (Year 3/4)  Long division (Year 6)  Estimating using the inverse  Estimating using rounding  Calculate with increasingly large numbers throughout KS2 and with fractions and decimals.  Order operations (BODMAS)

How do we teach number calculations?  Is starting with formal written calculations a good place to start when teaching children the 4 calculations: addition, subtraction, multiplication and division.  Is this how we were taught at school?  Did we understand the methods?

How do we teach number calculations?  We continue to use the concrete – pictorial – abstract sequence of teaching started in KS1.  This means that we use the concrete apparatus and models and images alongside formal calculation strategies.  Pictorial part of the sequence is vital in KS2 for deep understanding.

Concrete – apparatus or resources  Numicon  Counters  Place value counters  Multilink cubes  Dienes  Dominoes/ dice/ playing cards/ digit cards  100 square  Number line/ ruler  Rulers

Pictorial – models and images  Bar models  Part-whole models  Place value charts  Number lines

Pictorial – models and images  Bar models for addition and subtraction

Pictorial – models and images  Bar models for multiplication and division

Pictorial – models and images  Part-whole models

Pictorial – models and images  Place value charts and number lines

Abstract – written methods  White Rose Hub calculation policy and guidance (attached)  Horrington Primary School calculation policy on school website

Other areas of maths  The following youtube video is a really useful look at how bar models and part-whole models introduced in KS1 can be used in KS2 for finding fractions of a number  https://www.youtube.com/watch?v=odLkDr0v wkg

Conceptual variation – different ways of doing calculations  Different ways of writing calculations  Understanding = sign is really important  Missing numbers  Word problems  Asking questions using models and images  Draw this calculation  Show this calculation using counters  Finding errors in calculations

Any questions?