Starting with 'however' is confusing because I don't know what you are contrasting it to.
the parents???? This should be ''most parents' (in general)
They usually neglect their children’s needs and interest.- should be interests
may be very tired after school and will not have enough energy - should be may instead of will
their beloved children will learn nothing from those classes- again will is too strong
Students attend after-school - students who
students can feel a real classroom environment.- meaning is unclear
- For Teachers