i agree suspensions shouldn't be used, but in a way it is
effective.
When a student gets suspended, he or she is not allowed to enter
the school to study, hence will feel weird and probably remorseful.
Probably after a period of time, he or she will return to school,
and in most cases i've came across, the student has changed for the
better. Some even call the suspension period '' soul searching
period. ''
So somehow suspension does have its positive effect. However, it
should be put on the last few on the list of punishments. ( It
already is, though. )