Key Instant Recall Facts (KIRFs)
KIRFs (Key Instant Recall Facts) are the building blocks of maths understanding. They are the facts we just have to learn such as the pairs of numbers which total 10 (number bonds).
Although they are particularly useful when calculating, be it adding, subtracting, multiplying or dividing, if we are confident in our facts then all aspects of maths becomes easier.
They are organised in a 'rainbow' with red being the first level. Much of red, orange and green are facts for KS1.