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These resources have been reviewed and selected by STEM Learning’s team of education specialists for factual accuracy and relevance to teaching STEM subjects in UK schools.
The Commutative Law for Multiplication
This clip is the second of a suite of videos which look at progression in multiplication at primary level. It follows Sam, a Key Stage One teacher as she demonstrates how the commutative law for multiplication may be introduced through the image of an array.
Children are asked to represent a multiplication using various apparatus including: bead strings, coins, Numicon and Multilink Cubes. They are then shown how to represent calculations in the form of an array using coloured counters on a grid. The array is then rotated to show visually the commutative law for multiplication. Children then move on to create their own arrays for different numbers. Having come up with the possible arrays they are then able to transfer them into the calculations they represent.
This video has been produced by the National Centre for Excellence in the Teaching of Mathematics (NCETM).
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