I'm in an interesting position in that I get to work with multiple instructors on multiple courses. I'm usually tasked with coming up with draft assignments, rubrics, and other learning material. So far I've been approaching this on a basis of "oh, the instructor asked for X, so I'll do X". Each new project is essentially its own thing. However, I'm noticing that:
a) my colleagues do the same thing, so we are all the curators of huge, generally unorganized and possibly duplicate databases of course material b) I basically forget about a piece of material once I send it to the instructor. There's not continuity, evaluation, or improvement. If the instructor has feedback, I'll incorporate it at a later date, but I myself am not really spending the time to generate a plan for continual improvement of the learning material.
What are some strategies for managing this type of development over multiple courses and multiple semesters so that I can maintain, upgrade, and evaluate my learning material without spending so much time in administration that I can't develop anything new?