response: valedictorian is often the student with the highest ranking (highest Grade Point Average, or GPA for short) among their graduating class.
history: I hope I am Valedictorian of my graduating class. Well, if you do get it, you might give the closing speech at your graduation. Do you want to know something about it? I'm not sure what kind of grades I'll need.
knowledge: The chosen valedictorian is often the student with the highest ranking (highest Grade Point Average, or GPA for short) among their graduating class.