I'm a teacher. I choose a quality curriculum unit out of the library.
It's a water quality project. When I choose to run it with my class, the system tells me that this project is designed to be customized by the teacher. It asks me for the name of the creek we're visiting. It also asks me what tools we have. If we don't have litmus paper, it doesn't ask for pH.
Am I customizing?
Am I reauthoring?
How are those different?