This Powerpoint resource (consisting of 157 interactive slides plus printables) links addition and subtraction using visual images including bar models and number lines which can be used as pupils progress to larger numbers.
Once pupils understand the link, they can be more flexible with calculating; lots of us add rather than subtract even when faced with a subtraction calculation.
A range of models and images, interactive activities and games are utilised to encourage reasoning and develop understanding. Click on the thumbnails above for menus.
Games are also included to consolidate ideas and promote discussion by justifying choices. Instructions and demonstration slides are provided, as well as printable resources, so that the games can be played as a whole class or within groups.
Practical problems are used to provide an opportunity for pupils to apply the addition and subtraction facts.