This list of resources is suitable for all of KS3 as there are lots of differentiated ideas. This unit of work could take three plus lessons. It would depend on how long you wanted to spend on using the CIMT resources - Unit 11, third item. This unit can also be extended by how long you spend on the Helicopter task - this could take 1-2 lessons. I would suggest using the list in the order written as the Helicopter task is a lovely way to round off the data collection work.