The student's mother said parents were not warned that the sixth graders would participate in an Underground Railroad simulation.
Nearly 40 school districts closed on Friday because too many teachers had requested leave to go to the rally in Kentucky's capital city, Frankfort.
The school district said a survey also found the public supported an initiative to arm select staff members with guns if it became legal in Pennsylvania.
Activist Mommy blogger Elizabeth Johnston is urging parents to take their children out of school to protest against sex education.
"This is a symbolic way for the students to participate in their actual education."
Stacy Bailey's supporters, including some students, have asked the school board to reinstate her.
Sixty-three percent of TEACH recipients from 2014 had their grants turn into loans "that they never intended to borrow."
The policy is aimed at ensuring that children from low-income families don't start their education at a disadvantage because they were enrolled in school later than others.
470 school districts in the U.S. have at least one school on a four-day week but a lack of available data means that number could be much higher.
The president became a cautionary tale for De Niro's rapt audience.
In 60 Minutes interview DeVos appeared not to know how policies she pushed impacted school performance.
The suspects were detained after entering the school to pick up a friend and charged with second-degree trespassing.
Eighty percent of Republicans agree with arming teachers, while 88 percent of Democrats oppose it.
If my family hadn't fled Afghanistan, I would have had just a 17 percent possibility of being literate.
More than 277,000 students are headed back to class.
Schools are expected to be closed across all 55 of the state's counties.
"I will not be able to protect you the way an able-bodied teacher will," the teacher told her students. "...Don't worry about me."
Schools in Oklahoma are looking at bulletproof storm shelters to protect students from deadly tornadoes and the possibility of an active shooter on campus.