The school is following CBSE Syllabus, the students have to give his practical exams in Physic, chemistry and computers. So the school has to teach the students them practically so the school has one laboratory.
The Physics & Chemistry teacher is in charge of the labs. The teacher is able to show all the practical as there are all equipments available is the lab. The Students themselves have to do the practical. The students are given the equipment and they do the practical themselves and note down the readings.