Six self-checking Christmas maths code-breakers for Year 3 and Year 4. Pupils practise addition, subtraction, times tables to 12 × 12 and division facts. Each answer unlocks a letter, and the letters spell the punchline to a Christmas joke. If the punchline doesn’t make sense, pupils know to re-check, so the sheets mark themselves. Every sheet has its own code key, which stops copying. Includes: cover, teache