PowerPoint with related worksheet. Quick revision of area and perimeter on PowerPoint. Students are shown a few examples of how algebra can be linked with area and perimeter . Worksheet to test their knowledge with differentiated stages linked to learning objectives (constructing expressions, simplifying, substitution). GCSE question for plenary and self-assessment of learning. Have used parts of other resources found on TES to create the worksheet. Used with enthusiastic year 7 second set, but could be used at KS3 or KS4 if appropriate.