Best revision resources for me?

Aha try Revisely for physics and Exam Solutions for math.

Im starting A-Levels maths, physics and economics in September. I find sites like Seneca absolutely useless for me because of the way I learn. I find flashcards and testing myself very useful but what revision resource is good for flashcards-makers and those who learn by writing?
I’ve been considering UpLearn, as I’m trying to find one revision resource that I can use for all, but I’m not sure it’s for me! I find it confusing using 10 different websites for one subject and I’d like to find something compact and that has everything I need to know for my exams.
I learn by writing, testing myself using flashcards and doing exam questions. Also I struggle mainly on exam technique (using the right specific keywords), so what revision site would focus on that?

Does anyone have any suggestions for me?

Try RevisePal for biology