This is a bit long and complicated so I'll apologise now.
I'm a teacher and work job share a couple of days a week. For the last 18months - 2 years I have said to my headteacher that I'm very keen to take on extra hours, even short term. I've offered to cover 2 maternity leaves and various other bits and pieces throughout the school but these have all gone to others. I am being moved to a different class when we go back (as part of my professional development) and when we met to discuss what class I would be getting my HT intimated that there would be at least one day a week cover required in another class. From this conversation it was implied that I would be given this day, I've found out this week that another teacher (who is also part time and has only recently enquired about extra days, she's a friend) has been offered this, also that the new teacher who is taking over my old class/days has been offered the rest of the week covering another class. I am really annoyed as I feel that I have been passed over yet again. Also I did LOADS of extra (unpaid!) days at the end of term to help out with sports, graduation concert etc and really feel that I'm being made a mug of.
Have emailed my HT to, politely, ask if she is planning on offering me any extra days and if not what are her reasons but she has yet to respond (have read receipt so know she's seen it.
I don't really know what else to do or if I even have any real grounds for complaining to HR etc. Any suggestions wise MNers?
PS I'm in Scotland if that makes a difference.