Atlas is a senior fellow at the Hoover Institution, a conservative-leaning think tank based at the university. He's currently on leave while he works as an adviser to President Trump.
The latest instance of public school teachers calling in sick en masse comes a day after Gov. Rick Snyder's State of the State address, in which he did not directly mention poor school conditions.
Gov. Rick Snyder is facing calls for his resignation over tap water contamination in Flint. In his State of the State address on Tuesday, Snyder said he would release his emails from 2014 and 2015.