classroom cleanliness

1.I think my classroom is not clean because many people fold paper and throw waste paper on the floor so i think the class is not clean.
2.I think we must make the class clean because later if we any how throw things on the floor many insects may can come to our class.
3.I must keep the class clean by sweeping the class clean
4.I sweep the floor by participating in the event
5.I have learnt by keeping the class clean
6.I have learnt passin for learning from this work.