Classroom cleanliness

I think that my classroom is not clean at all(very dirty in fact.)Normally because of the boys who always fold origami's and throw bottles from a far distance 'and worst still sometimes they did not even throw them away. It is important to keep the classroom clean so that everyone in the class will has a clean environment to study in.For me,I will keep the classroom clean by sweeping at least 2 times a day.I had participating in sweeping the floor and cleaning my desk area before.I also learnt about self-discipline in this activity itself.