I have done a search on this but can't find exactly what I'm looking for.
I understand that if I want the end of term to be my last day (let's say 20th July for argument's sake) then I should write something like:
I am writing to notify you that I will be resigning from my position as Teaching Assistant effective 20th July...
...and I would still be paid for the whole of August (my contract asks for four weeks notice).
If I was to give this letter in earlier to allow them time to recruit, if the Head decided to be vicious could they force my resignation to start earlier? For his case I'd hand this in gleefully on the last day of term. For the sake of my lovely colleagues I'd like to give the place time to recruit for September.