Four friends spend Christmas together...but will ChristmaTHs really happen this year? Santa is in trouble and he needs their and YOUR help The story incorporates interactive maths questions to stimulate and help improve children's problem solving skills. The questions cover a few different levels of difficulty, carefully aligned to Key Stage 1 (and a little bit beyond to challenge really keen boys and girls ) in the UK, or suitable up to Grade 3 in the Common Core Standards in the USA.
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