Where might I find a collection of before and after proofread articles? Completely unrelated to my field (I do not work in languages) but I have written a small piece of software that proof reads my work for grammar and syntax. I'm interested in finding a few documents (ideally from a range of academic disciplines) that I can use to check my proof reading software.
If you perform a search for "examples of bad student papers" or "examples of bad writing" you should find many examples. As an added bonus, many of the examples are then analyzed to provide suggestions for improvements.