This is really a problem if a student sleep in the class. Students sleep in class due to several factors that may originate from their classroom itself or from somewhere else. Sleeping in class is generally perceived as of a lack of interest in the subject or teacher. Whatever the case, poor sleeping patterns of students deprives them from getting good grades. In this case teachers should send them to Nurse. If students regularly fall a sleep in class, keep them awake and angaged with physical movement and mentally stimulating activities in a well-lit classroom. However, following links may help in identify and solve the sleeping problem in classroom:

Reasons why students sleep in class

https://www.fractions4kids.com/reasons-why-students-sleep-in-class/

Dr. Ken Shore: Sleeping In Class

https://www.educationworld.com/a_curr/shore/shore005.shtml

How to Keep Classroom Sleepers Awake

https://www.edutopia.org/blog/keep-classroom-sleepers-awake-todd-finley

Strategies to keep sleepy students from falling asleep in class

http://bodyliterate.org/2014/11/19/strategies-to-keep-sleepy-students-from-falling-asleep-in-class/

How to Keep Classroom Sleepers Awake

https://www.edutopia.org/blog/keep-classroom-sleepers-awake-todd-finley

How do teachers deal with sleeping students

https://www.quora.com/How-do-teachers-deal-with-sleeping-students

What can teachers do to stop students from sleeping during class

https://www.quora.com/What-can-teachers-do-to-stop-students-from-sleeping-during-class