Question

what i can do to motivate my friends to stop littering in classroom ?  I need to write 10 steps 

Answer 1

First of all warn him/her from doing any further litter.
Then I would explain him/her the importance of cleanliness in class.
Still if he/she is doing I will have to complain to teacher(as in schools they are the head) and write a letter to the Principal on requesting to interfere into the matter.

Answer 2

make the friends aware of cleanliness.advise him about the illeffects of litteringin classroom.train them to make good things fromwaste materials. show videos to make them aware of cleanliness.seek the help oftheir parents and teachers to give the importanceof clean linss