First, they talk about making it a safe place to disagree. While some studies have the dynamic of no one talking, for fear of saying something wrong, it's a good goal to cultivate an environment where people can sort through questions and say something wrong, and be able to process through what the Bible teaches.
The key to this is asking good questions, and loving people well.
They also talk about avoiding using cliche's and explaining Biblical concepts in your own words and through story as a means of learning.
They also have lots of thoughts on Bible study homework. Is it fruitful to give it out? Is this an accountability group? What happens if someone comes to Bible study unprepared?