UPDATED to include school still planned for Ferguson-Florissant, Riverview Gardens and Hazelwood schools, and information on the fliers adults were handing out to students.

The Jennings School District will not hold school Monday and Tuesday in expectation that a grand jury will announce its decision this weekend on whether to indict officer Darren Wilson.

Parents in the Jennings district, which includes the eastern edge of Ferguson, will receive automated calls this afternoon notifying them that schools will be closed, Superintendent Tiffany Anderson said.

"With the heightened anxiety and activity, we thought it would be better for students and staff to extend the holiday at this point," she said.

The decision to close schools was not based on any notification from law enforcement that an announcement is imminent, Anderson went on to say. Once the decision becomes public, many are bracing for the possibility of volatile protests, which have been largely peaceful since Wilson fatally shot Michael Brown three months ago.

School officials aren't concerned about student safety inside the buildings, but on streets near some of them. Anderson wanted to give parents as much time as possible to figure out child-care arrangements for next week.