I have a couple of young flute students (10 and 11) who are really struggling to get a strong sound. They able to play with a reasonable tone but can't seem to play above mf. No matter what I say they just do not take enough air in before blowing. I have shown them how to breath properly but they just do not get it. When I learnt to play the flute my teacher went on and on about support etc, but I never understood what she meant. It was only through reading about it in books that I began to understand it myself!