2019 Teacher and Principal Evaluation Policy
The state should require objective measures of student growth to be included in a teacher's evaluation score.
Impact of Student Growth: Illinois requires student growth to be "significant," which is defined as at least 30 percent of a teacher's overall evaluation rating. Joint committees formed by school districts must agree on the student growth criteria within 180 days, or a district must default to the state model, which requires student growth to comprise 50 percent of a teacher's evaluation.
For each category of teacher, districts must include the use of at least one Type I (statewide or beyond) or Type II (districtwide) assessment and at least one Type III (aligned with course curriculum) assessment, along with a measurement model to assess student growth on these assessments. Student learning objectives (SLOs) are one option districts can choose as a measurement model. Teachers without Type I or Type II assessments must use two Type III assessments. Examples include teacher-created assessments and student work samples or portfolios.
State's Role in Evaluation System: Illinois districts develop evaluation systems based on criteria set forth by the state, or they can choose to use all or a portion of the state's model, the Model Teacher Evaluation System.
23 IAC 50.100, -.200
Due to Illinois's strong policies in this area, no recommendations are provided.
Illinois recognized the factual accuracy of this analysis, and was helpful in providing facts that enhanced this analysis.
7A: Measures of Student Growth
Many factors should be considered in formally evaluating a teacher; however, nothing is more important than effectiveness in the classroom. Value-added models are an important tool for measuring student achievement and school effectiveness. These models have the ability to measure individual students' learning gains, controlling for students' previous knowledge and background characteristics. While some research suggests value-added models are subject to bias and statistical limitations, rich data and strong controls can eliminate error and bias. In the area of teacher quality, examining student growth offers a fairer and potentially more meaningful way to evaluate a teacher's effectiveness than other methods schools use.
Unfortunately, districts have used many evaluation instruments, including some mandated by states, which are structured so that teachers can earn a satisfactory rating without any evidence that they are sufficiently advancing student learning in the classroom. Teacher evaluation instruments should include factors that combine both human judgment and objective measures of student learning.