please help!! edexcel gcse hist 12&16 markers

Hi!
I need a bit of help, as my november mocks are fast approaching😅

I'm currently in year 11 and am taking my only set of mocks in nov - i'm currently sitting at around a 5 and want to get my answers up to around a 7 and my teachers have said it's possible, and that I need to focus on my long answers, especially 12 and 16 markers (i do C&P, Weimar and Nazi Germany, Cold War and Elizabeth), but they haven't told me how to increase my answers from an 7-8/12 and 10-11/16 to closer to full marks. Please can someone share some techniques?
Thank you!!!