D.C. Public Schools are days away from informing a “sizable” number of teachers and school staff that they no longer have a job in the system because of “ineffective” performance, according to school officials.

A significant number of employees also earned “highly effective” ratings on the system’s one-year-old Impact evaluation system, and will be eligible for performance-based bonuses under the newly signed teachers contract.

“What you’re going to have is a much more accurate representation of our teaching force,” including the many who are “outstanding,” said Deputy Superintendent Kaya Henderson.

DCPS will release the actual number of teachers fired, as well as those who earned acceptable and extraordinary rankings, before the end of next week, Henderson said at a Thursday morning briefing. The final numbers are not complete, and she used the word “sizable” as a relative term in relation to the 6,600 employees subject to the evaluation. She did not give an estimate of what “sizable” might mean.

The bulk of teachers and staff — everyone from librarians to custodians — likely will fall in the middle rankings: “effective” and “minimally effective.” The Impact system is based on a complex set of measures, from how much growth a teacher’s students see on test scores to how productively the employee participates in the school community.

Henderson emphasized that the evaluation system serves as the foundation for the District’s effort to get an excellent teacher in every classroom, and to create a school system where parents would be equally happy if their child attended a school in Anacostia as they would be attending a school in upper Northwest.

A round of budget-based firings in the fall brought on fierce protests from many teachers. DCPS officials are hopeful that the firings to come will arrive as less of a surprise because teachers have been evaluated five times and were made aware of the results as they came.