Computer Science (Yr11): 

https://www.youtube.com/c/craigndave/playlists?view=50&sort=dd&shelf_id=1

Online GCSE textbook (use login details provided): https://www.classoos.com/  

Computer Science (Yr10):

https://www.youtube.com/c/craigndave/playlists?view=50&sort=dd&shelf_id=7

Computer Science (A Level):

https://www.youtube.com/c/craigndave/playlists?view=50&sort=dd&shelf_id=3

Online A Level textbook (use login details provided): https://www.classoos.com/