Reasoning and explaining (three days).
Children find three consecutive numbers with a given total, and are encouraged to explain how they do this to other children. They then go on to find what other numbers in a given range can be made in such a way, observing what they notice about such numbers. Two-digit addition is used to complete addition grids where numbers to be added are unknown, not just the totals. Certain numbers have to be worked out before it is possible to find others. Children are asked to explain their number suggestions. They then use their knowledge of inverse operations to solve ‘I’m thinking of a number’ puzzles, explain how they found the mystery number. They also write their own. The link with function machines is made.
Find additional lesson plans and resources at www.hamilton-trust.org.uk.
Children find three consecutive numbers with a given total, and are encouraged to explain how they do this to other children. They then go on to find what other numbers in a given range can be made in such a way, observing what they notice about such numbers. Two-digit addition is used to complete addition grids where numbers to be added are unknown, not just the totals. Certain numbers have to be worked out before it is possible to find others. Children are asked to explain their number suggestions. They then use their knowledge of inverse operations to solve ‘I’m thinking of a number’ puzzles, explain how they found the mystery number. They also write their own. The link with function machines is made.
Find additional lesson plans and resources at www.hamilton-trust.org.uk.
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Decent plans and resources - probably more efficient to search Hamilton site if you like the look of these.
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