Hey all so I did AS chemistry and got an A in my mock at the end of the year ( new specification so linear exams ) and I haven't touched chemistry over the summer and today I had an A2 lesson on thermodynamics and born haber ad I totally had no idea what was going on .. like I was so confused I felt dumb as hell. Is this normal to feel like you leave the lesson not really knowing stuff at A2? Is it perhaps A2 takes more independence and that the teachers are only supposed to introduce the topic ? Or maybe it's because I havent touched chemistry in a while but I mean this is the first time this has happened to me. ( first week back ) but like yeah I'm worried so any real advice On why I'm feeling like I've never done dop of chemistry in my life , is A2 really that much different ???