Teaching without curriculum requires you to do your homework. It requires a higher level of confidence with the subject matter.
You won’t have to teach the Bible very long before you will run into the real life pain of your group members. Some will struggle with a failing marriage, a wayward child, or the loss of a job.
Some of my favorite Bible studies are studies that go through the life of a biblical character. I love to learn about Abraham's faith, Joshua's courage, David's humility, and Nehemiah's leadership.
New information—especially information that doesn’t fit the way we normally think—produces discomfort. We naturally seek to make adjustments quickly to return to a state of equilibrium.