BBC bitesize - Computational thinking. Read all the pages and test yourself with the quiz at the end.

BBC bitesize - Algorithms. Read all the pages and test yourself with the quiz at the end.

BBC bitesize - Searching and Sorting. Read all the pages and test yourself with the quiz at the end. There is also a video on linear search.

Craig and Dave - Watch videos 49 through to 61 to cover entire 2.1 subtopic

101Computing - Full of nice tasks that help with revision

Exam question walkthrough - This video walks you through some past paper questions on 2.1

End of topic test - A test that covers all of 2.1