COLUMBIA — Superintendent Mick Zais is presenting his plan for evaluating teachers and principals.

The discussion Monday night in Columbia is the last in a series of public meetings. Hundreds of educators have attended similar gatherings in Beaufort, Greenville, Charleston and Florence.

Evaluating educators based on performance is a required part of the state’s exemption from the all-or-nothing provisions of the federal No Child Left Behind law. The U.S. Education Department approved South Carolina’s application in July.

But educators are upset about plans to include a school’s overall performance as part of their individual grades.

They also don’t like the idea of giving teachers letter grades. State Board of Education leaders said last month they have no intention of approving letter grades for the evaluation system set to start statewide in 2014.