Activities in this teaching pack include differentiated templates to practise using an abacus to record numbers that are one more and one less than one digit numbers for support ability levels and two digit numbers for core and extension ability levels when using the techniques of counting on and back.

The interactive presentation gets the children to explore how to use an abacus to record numbers that are one more and one less than two digit numbers.

This lesson is part of a maths scheme of work to get the children to identify and record the matching addition sums that are one more than numbers to twenty supported by concrete objects, pictorial diagrams and informal calculation methods. There are teaching activities for shared learning, differentiated worksheets to support independent learning and interactive presentations to introduce concepts and key skills.