This resource is a full lesson, possibly two depending on ability. I have used this resource with KS4 but it could be used with KS3.
Included is a presentation which covers lists and how they can be used within Python, a workbook that allows students to work with lists and a full lesson plan.
The workbook includes a series of tasks and challenges. It also includes areas for students to explain what the code is actually doing, showing their true knowledge and understanding.