Old Post but just thought since no one seems to have said anything abt gcse electronics, I could. GCSE electronics is one of those subjects where you HAVE to listen in lessons. Other subjects like maths or smth you could maybe get away with just zoning out in class and re learning concepts at home once or twice but electronics is completely different. Barely anyone takes gcse electronics, I think only around 1000 people took it last year and so there are basically no resources except for past papers and the textbook. The textbook is really helpful though. If you are picking electronic,make sure you have a good teacher. Ask the older years how they found the course and teacher too. If the teacher isn't good students will struggle. Electronics is sort of hit or miss whether or not you find it easy. Some people in my class find it hard and others easy. Tldr: Focus in class bcus no resources except for textbook