I have been asked to leave out all the work for a supply teacher to use tomorrow when covering my class because of the strike. I have informed SLT that union advice is not to leave work for class cover as that would undermine the point of striking and that I might as well be working. I feel that this has now caused me problems and am waiting someone getting back to me about this - I have been told that I am working today and therefore do the work I have been asked to do today. Any advice? Should I just leave the work? If I do that then striking is surely pointless as I might as well be in?