I helped my kids through college. Scholarships and loans got them the rest of the way. They will do better than me down the road while I'm retired watching them. I will not work longer then I have to.
My ex and I split their first year in college equally and we then split the remaining years 3 ways. This worked out well with our daughter, who graduated with about $22K in student loan debt. This did not work out so well with our son, who had a little too much fun in his freshman year and was asked not to return. He came back home, went to our local community college, state university and Clarkson University, all on his own dime.
He did not appreciate the opportunity that he had been given; however, he busted his butt from that point on and has done quite well for himself.