In this problem, we're investigating the number of steps we would climb up or down to get out of or into the swimming pool. How could you number the steps below the water?

The picture shows a lighthouse and many underwater creatures. If you know the markings on the lighthouse are 1m apart, can you work out the distances between some of the different creatures?

In this game, you can add, subtract, multiply or divide the numbers on the dice. Which will you do so that you get to the end of the number line first?

The idea of this game is to add or subtract the two numbers on the dice and cover the result on the grid, trying to get a line of three. Are there some numbers that are good to aim for?

Different combinations of the weights available allow you to make different totals. Which totals can you make?

In this game the winner is the first to complete a row of three. Are some squares easier to land on than others?

Do you notice anything about the solutions when you add and/or subtract consecutive negative numbers?

We received some well-argued reasons why a reef knot might be stronger than a granny knot.

How can we help students make sense of addition and subtraction of negative numbers?

What was it like to learn maths at school in the Victorian period? We visited the British Schools Museum in Hitchin to find out.