the questions will be slightly different in the way they are worded and content will be also different but you have teachers to ask that can help fill the gaps in your knowledge. I do history edexcel and if you use bbc bitesize for history and use a different exam board, there will be a lot of information that you would already know and some information that is not what you already know. The way you would answer would probably be slightly different. I do history edexcel and if you use bbc bitesize for history and use a different exam board, there is some knowledge that you would already know and some information that is not what you already know. Not sure about the markscheme though