PM - This free downloadable PDF book was the catalyst for a change in thinking about learning environments. While not the first, it really gathered some traction within the tertiary environment in 2006. A great, worthwhile read.
EVERY teaching space architect should be forced to read this book before designing a classroom or any building at an educational institution.
I love the whole book, but my favourite is chapter 13, the lecture hall at LeBaron, Iowa State.