I often make presentations and want to share my resources with teachers. I tend to put a lot of speaker notes on my google slides and I wanted the participants to have access to them but I didn't want them edit my original document. In the past I just put a STOP slide first and gave instructions on how to make a copy so they didn't unintentionally write over the master document.
At a conference I was at this summer a teacher said there was a way to force users to make a copy. After a short internet search I came across this blog post - force users to make a copy of a Google doc on a website called Shake Up Learning. It was exactly what I needed!
As an added bonus..the blog is really good and focuses on all things Google in education (I would definitely recommend following or subscribing). I also follow the owner Kasey Bell on twitter as well @shakeuplearning.