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This teaching resource is for both teaching how to use Carroll diagrams and for practising using them, in the context of multiples. There are two modes:
Demonstration Mode: This is untimed and unscored. It gives immediate feedback and numbers can be moved repeatedly. Teachers may like to use this on an IWB or tablet to demonstrate the concept.
Challenge Mode: This is timed and records scores. Players must allocate the numbers as quickly as possible. Numbers can only be moved until the player goes on to the next number. Each wrong answer incurs a 10 second penalty. Scores are retained on the device for subsequent sessions.