Some students set different homework for students during the winter holidays according to students' scores,and some students are even set freely from homework.This situation (加has)caused a heated discussion among parents so far.Some parent (parent- parents)aren't in favor to(to - of) it.They think that the behavior means treating students differently,want (want - wanting )will hurt poor students' feeling greatly.To make the matter better(better - worse),it will divide the students into different groups.That not only results in nervous atmosphere appear(appear- appearing) gradually among students but damages the relationship between students or(or- and) their teachers.However,others believe there are(are- is) no need for good students to repeat what they have learned it(it去掉) well again and again.They think good students should be given more chance to explore interested (interested- interesting)things and improve all-round ability.