1.Claim: Present a claim. What's going on here?
2. Support:Ask students what they might already know about this claim? OR After you have studied a topic, how will you support this claim?
3.Question: Ask students to think beyond supporting the claim and share evidence for an opposing view. What's the evidence for the other side?
4. Share their thinking-Did your stance change or is it now questionable?
If you want a more in-depth explanation of this strategy see Making Thinking Visible by Ritchart, Church, and Morrison.