What an amazing maths lesson. I worked with both classes today to investigate perimeter and use our reasoning skills. We discussed measuring lines to find the perimeter of shapes and how many sides we have to measure.
We gave reasons to back up our ideas for example-
‘On my square I only need to measure one side as all the sides are the same length. Then I add this together four times.’
‘To find the perimeter of a rectangle I only need to measure two sides and then double both of them before adding them’.
We also decided that a ruler will not always be the only tool we can use for measuring.
We even started looking at algebra!
Amazing work. Well done Year 4.