Isn't it grand

I love those moments when I open my e-mail and find something like this waiting for me:

I want you to know that, thanks in large part to your efforts in designing the ***class name*** citations online tutorial, this year, for the first time since I've been teaching ***, I had no major incidents of plagiarism. In addition to my usual instructions, I assigned your online tutorial as a required homework before the final papers were due, and I checked all the final papers using turnitin.com. Although there were a couple of students who didn't put quotes around extensive direct quotations, everyone gave at least some form of attribution where it was needed. YOU have made my exam week much, much simpler by doing this!