Teachers, principal, students are necessary to run a good school for the following reasons:

1. Teachers:
Teachers play a crucial role in the functioning of a school. They are responsible for imparting knowledge, guiding students, and facilitating their learning. Without teachers, a school cannot function effectively. They create lesson plans, conduct classes, assess students' progress, and provide necessary support and guidance.

2. Principal:
The principal is the administrative head of the school. They ensure that the school runs smoothly and efficiently. They oversee the daily operations, manage the staff, and make important decisions related to curriculum, policies, and student welfare. The principal is responsible for maintaining discipline and creating a conducive environment for learning.

3. Students:
The students are the heart of a school. They are the reason schools exist. Students come to school to gain knowledge, develop skills, and grow as individuals. They participate in various activities, engage in discussions, and build relationships with their peers. Without students, a school would have no purpose.

Why are these three elements important?

1. Learning Environment:
Teachers, principal, and students collectively create a positive and conducive learning environment. Teachers provide quality education, guidance, and support to students. The principal ensures discipline, safety, and a healthy school climate. Students actively participate in the learning process, collaborate with their peers, and contribute to the overall school atmosphere.

2. Academic Progress:
Teachers play a vital role in students' academic progress. They deliver lessons, explain complex concepts, and provide individual attention to students when needed. They assess students' understanding and provide feedback for improvement. The principal monitors the academic performance of students and takes necessary steps to enhance it. Students, on the other hand, engage in classroom activities, complete assignments, and strive to excel academically.

3. Holistic Development:
A good school focuses not only on academic excellence but also on the overall development of students. Teachers, with their expertise, guide students in acquiring knowledge, critical thinking, problem-solving, and various skills. The principal ensures that co-curricular activities, sports, and cultural events are organized to promote the holistic development of students. Students actively participate in extracurricular activities, learn teamwork, leadership, and develop their talents.

Conclusion:
In conclusion, a good school requires the presence of teachers, principal, and students. These three elements work together to create a positive learning environment, ensure academic progress, and promote holistic development. Without any of these elements, a school would not be able to function effectively and fulfill its purpose of providing quality education to students.