Where did the kid get 48 from? How would you help him, err, not get 48 in the future?
Clearly, the student’s work has more than one issue. But what issues doesn’t it have? What does the student clearly know that you could build on? What’s something that he clearly needs to work on, and how would you help?
What does the student understand, and what does she not? How would you help?
What is this student thinking? It’s a bit tricky, so extra points if you come up with a complete story that includes a list of things that we know that this kid knows.
What aspect of solving linear equations is this student struggling with? From the student’s point of view, why does the moves made seem like the right ones?
Are there any interesting things that you do to help students with linear equations? How do you make the right moves seem intuitive?