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Subitising
In this article for EY practitioners, Dr Sue Gifford outlines what we mean by subitising and how we can teach it.
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Developing number fluency - what, why and how
In this article for primary teachers, Lynne McClure outlines what is meant by fluency in the context of number and explains how our selection of NRICH tasks can help.
problem
Cat food
7 to 11
Sam sets up displays of cat food in his shop in triangular stacks.
If Felix buys some, then how can Sam arrange the remaining cans in
triangular stacks?
problem
Little boxes
7 to 11
How many different cuboids can you make when you use four CDs or DVDs? How about using five, then six?
problem
Dice and spinner numbers
7 to 11
If you had any number of ordinary dice, what are the possible ways
of making their totals 6? What would the product of the dice be
each time?
problem
The mathemagician's seven spells
7 to 11
"Tell me the next two numbers in each of these seven minor spells",
chanted the Mathemagician, "And the great spell will crumble away!"
Can you help Anna and David break the spell?
problem
Unusual long division - square roots before calculators
14 to 16
However did we manage before calculators? Is there an efficient way
to do a square root if you have to do the work yourself?
problem
Sticks and triangles
7 to 11
Using different numbers of sticks, how many different triangles are
you able to make? Can you make any rules about the numbers of
sticks that make the most triangles?
problem
Favourite
Six places to visit
7 to 11
Can you describe the journey to each of the six places on these maps? How would you turn at each junction?
problem
Speedo
16 to 18
Investigate the relationship between speeds recorded and the distance travelled in this kinematic scenario.