Public schools in Genesee and Lapeer counties, neighboring counties north of the Detroit area, started the Christmas break Wednesday night rather than hold classes the rest of the week. Meanwhile, police investigated whether students made false claims about guns at the high school in Grand Blanc, said John Potbury, a spokesman for the Genesee County prosecutor.
Last week's shooting at a Connecticut elementary school "changed all of us. ... Canceling school is the right thing to do," Genesee County schools said in a statement.
A Lapeer-area superintendent, Matt Wandrie, said rumors of violence had become a major distraction for students and staff and have disrupted learning. Additionally, he said in a message to parents, "rumors connected to the Mayan calendar predicted end of the world on Friday have also surfaced."
Friday is the day when some people believe ancient Mayan calendars predicted the world would end.
"Although we in the county are reluctant to cancel school because the rumors are unsubstantiated, we feel it is the most appropriate decision," Wandrie said in his message.
Elsewhere in Michigan, Cass City schools were supposed to hold classes for three days this week but decided to cancel after students said they overheard another student making a possible gun threat against a staff member last week.