What have you learned about Ben's character in chapter 4?

In this chapter, we see Mr. Ross preparing his lesson plans. Through this, Strasser demonstrates that the teacher truly does have good intentions in starting the experiment. It also becomes clear from these passages that Mr. Ross has underestimated the impact of what he is doing. He brushes off the experiment after Christy asks him about it, and is hesitant to bother pursuing it for another day.

What this is "Strasser"  ?