I have just been sent the format for my interview for a Yr 5 teaching post on Tuesday. Part of the process is a 15 min lesson for 25 Year 4 chn which should 'focus on developing an understanding of area'. Most of them are apparently working at age related expectation though some are working below. That is all the information I have been given and I am scared! Firstly, I have never taught Year 4 and secondly, what on earth can you do in 15 mins???? Then I have no idea if they have been taught area before at all. I know the learning objective for Year 4 area is to find the area of rectangles by counting squares but how to teach it and get them to do a differentiated task in 15 mins? Any ideas would be MUCH appreciated!