What are three ways in which lack of clean water affects teaching and learning

Lack of clean water could make children sick, therefore missing school, and they may not be able to catch up on their missed work. Children may also not drink the water, because it isn't safe for drinking, so they will become fatigued and not pay attention. The teachers would also have a hard time dehydrated children, even the most skilled teachers couldn't treach distracted kids 

The lack of clean water can make make students and teachers sick so either on can miss school which take away from something being taught and/or learned. The lack of clean water can lead to students not using bathrooms and drink water at school which can lead to students skipping and being dehydrated in school, it can also make students less motivated to go to school in general. The lack of clean water can also be an issue when doing certain science experiments.