If one of my classmate speaks very loudly and does not let others participate in class discussion, then that would be wrong. in school everyone should participate in every discussion so that they can build confidence and speaking skills, and their thoughts and ideas will not be known whether they are right or wrong. teachers cannot correct others. only that student's voice would be heard and others may not like her. i would advice her not to do so because if she continues to do like that, others may not like her and teachers may not respect her. then she would not get more ideas of other students. everyone should speak softly.