I found this web site helping a colleague by phone with instructions in using the Mountbatten Braille Writer--or as one of my 'dahlin' little students used to call it: "Mountinbatten". It actually has FAQ's and videos for instruction! This way, if you're at one of your million other schools, the teacher can use this site for problem solving rather than calling you back from the other side of town or waiting until you get back to help the child.
It has also been a refresher for me just exploring it this evening as I've been about a year without a student who needed it and I'm a little out-of-practice with certain features.
There is also a section for parents. I believe if parents have a child who is learning braille, the parent should be learning right along--and that includes the equipment the child uses. Parents should have some knowledge of braille but you'd be surprised at how many don't bother to learn it.
At any rate, here's the link: http://www.mountbattenbrailler.com/index.html