principal

A principal is a person that manages a school.[1]

The main responsibilities of a principal is listed here:

1. Shaping a vision of academic success for all students
2. Creating a climate hospitable to education
3. Cultivating leadership in others
4. A Profile in Leadership: Dewey Hensley
5. Managing people, data and processes
6. Improving School Leadership
7. Additional Readings[2]

The average salary for a principal is 87,760 annually.[3]

To be come a school principal, you need to: 

1. Earn a bachelor's degree and become a teacher. Most school principals begin a career in education by teaching.
2. Gain teaching experience.
3. Teach in as many levels as possible in a short time. 
4. Find ways to demonstrate strong leadership skills.
5. Research your district's principal qualifications.[4]

Reference

1. Google Search - What is A School Principal?
   
2. Five Key Responsibilities - The School Principal as Leader: Guiding Schools to Better Teaching and Learning
   
3. Google Search - Principal Salary
   
4. Google Search - How to Become a Principal