I'm a CS teacher and use Pollen to write my assignments (sample: https://drive.google.com/file/d/0B9DAZWpkQIDuUlA4SU5lcHItRDg...). It allows me to type assignments as fast as I can think them, in a specialized mark-up language for exactly the type of assignments I give. I can then apply various post-processing operations (like doing syntax highlighting, converting straight quotation marks to curly but not when inside sample code, numbering of problems, inserting special CSS to make the assignments print with nice margins / without breaking up headings and paragraphs that belong with them, etc.) all with very little pain.

It's also neat to show students, after they've spent months learning Racket, that all sorts of useful things -- including the writing of their assignments! -- can be automated with their new skills.