Ways in which lack of clean water affects teaching and learning

There are many ways in which clean water affects teaching and learning like if in schools there is no clean water or there is no water how students and teachers drink water as water is the necessary need of everyone. In this case teachers, students lose their momentum and does not pay attention on studies. Sometimes they get sick and due to this they become absent from school and this also affect teaching and learning. Schools cannot run programs and classes if they cannot provide water in the school for teachers, staff and students.

well wheres the question