Understand and use one less

Description:

Pupils are able to understand and use the concept of one more or one greater.

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Section: Early Years (0-5yrs) info; Primary (5-11yrs) info

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Activity/strategy name and materials required	How to do the activity	Key principles for doing the activity and comments
Tea party 3 soft toys Plastic tea set Plastic food Two bowls and fruit to cut into fruit salad	Have a tea party. Hand out the food. Point out which ones have less. Ask the child to take away a piece of plastic food from one of the toys so that it has one less - say that it has got "one less". Make fruit salad. Use two bowls. Cut up fruit for the two bowls and ask 'One less banana here? 'Can the child tell you what to take out of each bowl using 'one less'.	Avoid working on "one more" and "one less" together until the child has mastered both of these. When both are mastered, you can mix both concepts in this activity, for example asking "one more banana here?"
Number line Number line	(1) Use a number line and mark a central point with a red dot stuck on with blue tack. Ask the child 'show me one less' and model one less e.g. say 'look....one less is ....' and put a small blue dot on the number with Blu-tac. (2) Move the central red dot and ask the child to show you 'one less'.	Avoid working on "one more" and "one less" together until the child has mastered both of these.