#i technically did do it at GCSE but i essentially grabbed the textbooks and learnt the core. Most places wont let you do the A-level unless you've done the GCSE. I didnt have any formal lessons and I wasnt shown how to write an essay, you can pick it up pretty easy from what you learn in English. And often your AS teacher will show you how its done considering the GCSE structure is really not fit for use!! Im sure you'll be fine. It's the A2 which gets a bit harder!