How do you know?
How could we check?
Could you give me more details?
How could we explain this?
How is this the same or different?
What is a different idea?
What is an example of that?
What ideas/thoughts do you have?
What is a new idea?
What if...?
What are some different possibilities?
What questions could we ask?
What did we learn?
What could we do differently?
What could we change?
