As time is always precious, you can get the essentials from the website resources (I was able to implement the QFT in my classroom from the web resources before I had the book).
I haven't used the process with teachers, but it's an interesting idea. It really depends on the needs and openness of your staff. The general process would work well, but I imagine some teachers might not be as open to the section on categorizing/changing open/close-ended questions. The metacognitive/reflective discussions about developing effective questions for strategic thinking and problem-solving could be really interesting. While the book talks about using the process with low-income parents, I hadn't thought of using it with teachers. Thanks for raising the possibility. :)