Again, this is absurd.... show me the statistics between grades vs. hijabs/niqabs? Does grades go down when a Muslimah is wearing a hijab/niqab? What if this person is on top of her class, with all A's and she is wearing a hijab/niqab?
Similary, in some other European countries who are trying to ban the hijab/niqab totally. I want them to show me statistics of crimes vs. hijabs/niqabs. Does the number of crimes go up when a woman wears a hijab/niqab??? This is proposterous. I can show them the statistics of women getting raped for not wearing enought clothes. Ask yourself, which is better for society as a whole. They say it is important for teachers to see the pupils and to make eye contact, what if I was blind? Go help those people first. These people have no validity and reason in their subjective views.
walaakum salaam