The term 'Head of the Class' can refer to several different people in a school setting. A professor, or PROF (4 letters), is typically the head of a college or university class, and is responsible for teaching the course material and grading assignments. A Valedictorian (13 letters) is the student who has achieved the highest academic standing in their graduating class, and is usually chosen to give a speech at the graduation ceremony. A TEACHER (7 letters) is an educator responsible for instructing students in a particular subject or subjects. Finally, a MrBig (5 letters) is a slang term for a TEACHER who is particularly respected by their students. All of these people can be considered the 'Head of the Class' in their respective roles.