Share 'Advice for an interview'

Hi, this is my first post so hello! I have my first interview soon for my NQT post. I can teach anything I want so have decided to do a French lesson. I will be teaching a Year 4 class. Would it matter if I ended up teaching them something that they have already been taught? Obviously I do not know what they have already been taught, if they follow a scheme...etc. Do you think I should phone a...