Why did nick ask teachers a question right before the bell rang and class got out?

Nick likely asked the question right before the bell rang to either clarify a point he found confusing or to engage with the teacher and ensure he understood the material before leaving. This timing could also suggest he wanted to show his interest in the subject or needed information for an upcoming assignment. Additionally, asking just before class ends might have been a strategic way to get the teacher's attention when other students were less focused.