Edexcel A level Physics Exam Tips?Watch
I truly believe the best way to improve is practicing as many questions as possible! Obviously you need a solid understanding of the topics before so as well as your textbooks I recommend the following:
-A level physics online: videos and the odd questions
- TL physics: videos
- Science shorts: videos
To practice, you can find loads of questions on Physics & Maths Tutor, and you can use past papers. There's also a website called examsmasher which I recommend as it gives you a load of questions on each topic. Isaac Physics is also very good.
Physics has very pedantic mark schemes imo, but the questions are often always recycled (with different contexts) therefore learning standard responses (such as electric field strength is the force per unit charge acting on a positive charge) will help you, as that's where I tend to go wrong!
Once you're familiar with the maths questions, you do tend to memorise the formulae, or at least know where to look on the formulae booklet, saving you a lot of time in practice!
If you have any specific questions you would like help with, I'd be happy to have a look for you!