This is a 9 slide powerpoint that I put together after marking 2 sets of coursework, and finding the same errors time and time again. I now show this to the students in advance, to try and avoid these errors. It starts with a simple starter task, where students have to correct/improve 5 sentences. These sentences contain some very common errors eg. tense disparity. Then there are 10 targets-a few of them with examples, to illustrate the point.