BBC bitesize -Memory and storage. Read all pages and then test yourself with the quiz at the end, there is also a video on RAM, ROM and virtual memory

BBC bitesize - Units and data. Read all pages and then test yourself with the quiz at the end, there is also a video on how computers process images

Binary Number Exercises

101Computing - Full of nice tasks that help with revision

Craig and Dave - Videos 6 through to 22 cover the entire 1.2 subtopic (I know it's alot)

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 - Summary of 1.2 (not including units/ binary)

End of topic test - A test that covers all of 1.2