A friend of mine and his math department started implementing a portfolio of work for students to be able to show employers. I'm not sure how that's going, but I like the idea.

My scaling solutions are usually some form of outsourcing: I replaced partial credit with making students do another assignment explaining their own mistakes, I used Khan Academy math modules, I made them go to the tutoring center for some things before they could come to me, I had them correct each other's work.