I think as a teacher it is down to me to make sure all the preparations are done – there is a place for letting students just play , but I think it is down to the teacher to ask questions like – are your hands in the right place? – how many do you have to count in this piece ? , is there anything you need to remember throughout this piece? etc , before they begin and prompt’ don’t forget to count in’ etc , if you do it every time then it becomes the natural way to start the each time – start from the very first lesson .