The reason they are “entitled” is?
Check it out:

The Department of Education released a fact sheet Monday about the availability of public school education for undocumented immigrant children — specifically the tens of thousands unaccompanied minors who have recently entered the U.S. illegally.

“We have begun to receive inquiries regarding educational services for a specific group of immigrant children who have been in the news – children from Central America who have recently crossed the U.S. – Mexico border,” the Department of Education explains.