There is a really good website called “My GCSE Science”. It does questions and answers but mainly videos for all three sciences. These videos cover everything in a simple way and it really helps me to link different ideas. I also take notes from the videos. They do the videos for multiple exam boards.
They however do cost. There are 3 different packages which cost different amounts but have a look on their website. They also have a few taster videos for free on YouTube. I got the £50 best package but split it between 6 of my friends so it was a very reasonable price in the end.
Hope this helps.
Loughborough at number one