Students can understand the importance of school too.
Teacher will ask some questions to let them understand the concept:
1.) Where in the school do you study?
2.) What are the places you  saw or go in the school? 
3.) Where in the school do you learn dance?
4.) Where in the school do you play?
5.) How did  you know  the place was library/ Principal's room/ Playground? (By showing slide #13 and 14)
We find lots of books in a library/ The principal ma'am sits in the principal's room/we can find swings and slides in the playground.
6.) Apart from  Principal and  Teachers, who are the other people that work in the school? (gardner, sweeper, maid, librarian, peons, etc.)
And explain what type of work they do in school.
Students can understand the importance of people that works  in school