article
Divisibility tests
This article explains various divisibility rules and why they work. An article to read with pencil and paper handy.
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article
Developing number through tidying up
This article describes how one nursery setting focused on tidying up time as a context in which to explicitly target the development of number and calculation skills.
article
On the importance of pedantry
A introduction to how patterns can be deceiving, and what is and is not a proof.
problem
Sending cards
7 to 11
This challenge asks you to investigate the total number of cards that would be sent if four children send one to all three others. How many would be sent if there were five children? Six?
problem
Distribution differences
14 to 16
How could you compare different situations where something random happens? What sort of things might be the same? What might be different?
problem
Favourite
More number pyramids
11 to 14
When number pyramids have a sequence on the bottom layer, some interesting patterns emerge...
problem
Favourite
Product Sudoku
11 to 16
The clues for this Sudoku are the product of the numbers in adjacent squares.
problem
L-triominoes
14 to 16
L triominoes can fit together to make larger versions of themselves. Is every size possible to make in this way?
problem
Favourite
Odds, evens and more evens
11 to 14
Alison, Bernard and Charlie have been exploring sequences of odd and even numbers, which raise some intriguing questions...
problem
Sending and receiving cards
7 to 11
This challenge asks you to investigate the total number of cards that would be sent if four children send one to all three others. How many would be sent if there were five children? Six?