K-12 schools across the U.S. are gearing up for potential efforts to shield their students as the incoming Trump administration sets its sights on deporting millions of people.

Administrators and teachers' unions are looking to build relationships and provide resources for students and families without legal status as President-elect Trump has pledged the largest mass deportation in history, floating the end of policies barring immigration raids at schools and places of worship.

School officials and advocates are ensuring staff understand the rights to privacy that immigrant students have and how to tackle other issues that may arise such as slipping attendance as undocumented families fear the worst.

Trump's incoming "border czar" has said he plans to revive family detention centers, and that halfway homes may be necessary for U.S. citizen children with non-citizen parents.

“I don't know what [Trump's] true agenda is going to be until he gets in, but I can tell you this, he's scaring the living hell out of a lot of kids who are just here trying to make it,” said Todd Quarnberg, principal of Utah's Herriman High School, which has had an influx of migrant students over the past few years.

Hundreds of thousands of undocumented students attend public schools across the U.S., and many more are U.S. citizens with undocumented parents who could find themselves lacking a........

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