*In the tried and tested articles, advisers will share some of their interesting tried and tested approaches to teaching mathematics. In this sequence, the Rachel Rayner focuses on developing the skill of rebalancing as a mental strategy.*

Rachel Rayner is a Primary Mathematics Adviser for Herts for Learning

Have you ever noticed how introducing a new drop in the mathematics ocean causes pupils to think differently about already learned concepts? What follows is a sequence of learning, much loved by me, as it has caused all kinds of new links with number to be made for pupils as well as deeper understanding of core concepts such as *conservation* and *sum *from Year 2 to Year 6. It also challenges pupils preference for working left to right in their calculations (I certainly found that my children’s favourite option) but instead attend to the numbers involved, allowing a far better informed decision about the strategy selected. The strategy also focuses on the nearness of landmark numbers and the skill of rounding. This supports estimation and a sense of what is reasonable for further development of number sense. Continue reading “Rebalancing sums – and the ripple effect”