BBC bitesize - Read all pages and then test yourself with the quiz at the end, there is also a video on Fetch-Decode-Execute

Craig and Dave - Videos 1 through to 5 cover the entire 1.1 subtopic

101Computing - Full of nice tasks that help with revision

Exam questions and answers - The question pack is in the description but if you need help then the video explains all the questions and answers

Summary  - Video summarising the contents of 1.1

End of topic test - A test that covers all of 1.1