A set of 42 code breakers covering a wide range of skills. Find the Christmas image on the key to discover what kind of number you need to write.
 
These code breakers are aimed for children in upper Key Stage 2 (Year 5/6) and beyond. Encourage them to become more confident with a range of mathematical terms, such as square numbers, prime numbers, factors and a variety of multiples.
 
Print, laminate and trim before asking the children to solve with whiteboard pens. Wipe and use time and time again to increase fluency.