CHICAGO (CBS)– Classes are canceled again Tuesday, and the rest of this week, for the Evanston/Skokie District 65.

In a letter to parents, the district says “we do not have adequate staffing or sub coverage.”

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On their website, the message front and center “schools closed.”

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As of Tuesday, there are more than 4,100 unfilled full-time positions in Illinois schools. More than half of those unfilled seats are in Cook County.

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That number is more than double what it was four years ago.

CBS 2 Chicago Staff