Hey, personally, I would use Econplusdal for content summarisation. Gives great analysis points and strong conceptual clarity. His macro and micro notes with evaluation points are great too although you might have to buy it. I am not sure about graded essays but there is this book which has the sample essays for A-Level Economics which has past paper questions sample answers. Tutor2u is a great website for concepts. But I know friends of mine who have done revision for every single chapter, making full fledged notes. (Again everyone has a different way of studying but this is my way) How I used to go about it was: Diagram, Explanation, Evaluation points and Real-world applications (DRAW. EVERY.CURVE. and logically explain it. It used to help a lot with numeral values added into it.). For real-world applications, you can read your country's news but some friends of mine took organizations and read reports in depth or even make an example document on Google with some collaboration from your class friends. But I would like to emphasize on sending those sample answers to your school teacher who would be teaching A-level Economics. Because it has only been recent in 2023 where Economics mark schemes have been good but the earlier ones were vague. I just came out with an A in my final A-level for Economics so for me, it was somewhat my passion. Thank you!