"Effectiveness levels" refers to the different degrees or stages of how well something is able to achieve its intended purpose or produce a desired result. It signifies the varying degrees of efficiency or success in accomplishing a task or goal.
The measures also could be the foundation of new teacher salary schedules that would provide the largest pay hikes when a teacher's effectiveness level improved. (learningmatters.tv)
The report tracked teacher retention patterns alongside effectiveness levels from 2011 - 13, when the state first implemented its multiple measures evaluation system, the Tennessee Evaluator Acceleration Model (TEAM). (educationnext.org)