I actually encourage my students to POST all of their WORK under a by-nc-sa Creative Commons license so that other people/students can build on their work - it'

I actually encourage my students to POST all of their WORK under a by-nc-sa Creative Commons license so that other people/students can build on their work - it's actually EASIER to check for plagiarism when their work is online - I just Google it and it will flag if they are copying verbatim.