M2FM where are you? I know in my school board, Niagara Region, Ontario, that a child can be picked up on a bus based on their childcare providers address not just their home address. Its not really anything out of the ordinary so it might not be as difficult as you think. Call your school board and ask for the number for school transportation and ask them directly. No sense in assuming based on most likely inaccurate information. My biggest no would be dropping down to part time. Write up a new contract, or an additional document for her while she is on Mat leave that this is still a full time spot.