I've put together a small list of writing and copy editing leads that deal with either educational books or require an education background.
ESL/ELL/ELT Writers and Editors Needed for an Upcoming Project
Editor- Language Arts Background
Editors Needed for Humanities Reference Books
Wanted: English, Psychology, History and other Liberal Arts Majors
Staff Writer for Education Company
Editors (Union Square)
Please drop me a note if any of these work out for you. I'd love to hear about it.