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Public school systems around the country preparing to begin a new school year will be facing the added burden of enrolling more than 37,000 unaccompanied minors who have entered the U.S. illegally.

According to the Administration for Children & Families’ Office of Refugee Resettlement, 37,477 alien children have been placed with relatives or other sponsors around the country so far this year while their immigration cases are being processed in court.