Thread:Rename the title (6)

I added most of your edits to the document.

Two things:

1) I think Wayne has specific reasons for mentioning K-18 educators in the introduction. I tried changing the sentence to mention K-18 educators, while being inclusive of other groups. 2) We need to decide whether or not we are going to do case study-type tutorials before we can add text to that effect in the Preface.