I sat, stunned (惊呆), for about half an hour, wondering what had just happened. How did I make such a life-changing difference to that boy without even knowing it? What I finally came to remember was one day, several months before, when some students were giving reports in the front of the class. Jeanne spoke quietly, and to encourage her to raise her voice, I had said, “Speak up. Simon’s the expert on this. He is the only one you have to convince, and he can’t hear you in the back of the room.” That was it. From that day on, Simon had sat up straighter, paid more attention, smiled more, and became happy. And it was all because he happened to be the last kid in the last row. The boy who most needed praise was the one who took the last seat that day. 

文中的 in the front of the class 有问题吗？感觉应该是 in front of the class（在全班学生面前）吧？