In my case I let my son continue in private school as I decided for various reasons it was in his best interest not to disturb him. I have to pay the entire fees though as the opposition party refused and even fought me on it but I still believe the sacrifice was the right thing to do for my boy.
(As an aside the problem I have with Child Support is that it is not accounted for - I would like to see actual receipts and for it not not to be tax free for the recipient - this seems to be a fair way to ensure that its used for necessary expenses for the children.)