Put the people in charge of the school in jail if they do not intergrate the children. Give them like 24 hours... As for religiousity, it is the teachers who should inspire the students and guide them to behave appropiatly according tp the religion. I think religious backround is completly irrelevant.
Fire in Jerusalem suburb causes severe air pollution (Haaretz)
from the article: Haredi school segregation survives High Court challenge