Abe and Sarah

I'm teaching Sunday School. Here's the assignment for Sunday:

Read Genesis 11:27 - 12:20; 17 - 18; 20:1 - 21:7; 22 - 23. What do you notice as you read that you had not noticed in earlier readings? What questions do these texts raise for you? Why are these stories important?

Sarah is also mentioned in Romans 9, Hebrews 11, and I Peter 3. Do these texts note the same points you did?

Wonder whether that'll generate any discussion...