...I'd probably start a scholarship fund in my Dad's name at the HS where he taught - that would cover full educational costs for someone going into teaching.

I've also thought I'd start a trust that would pay for the education - including some amount for room and board - for my grandkids. With built in requirements to receive a certain grade or higher and graduate within a certain amount of time so that no one turns into a life long student.

There would probably be some for other charities I like as well.