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Assessment Based on Student Gains : Value – Added Assessment in Tennessee The Tennessee Value-Added Assessment System (TVAAS) was developed by William Sanders using a statistical model based on growth or gains in student achievement scores rather than fixed standards. The Tennessee Comprehensive Assessment Program provides yearly measures of student learning in grades 2-3 . Based on this rich source of data the TVAAS compares each individual student’s growth to his or her own previous growth rate. This is, this year’s gains for each individual student are compared to the gains made in previous years. With TVAAS, all student serve as their own control for learning gains; it is assumed that the same potential for learning exists each year. Average student gain are calculated at the teacher level to determine if expected student learning was achieved. This information is then used to assist in the development of professional growth plans by teachers.Comparing the Four Teacher Assessment Approaches All four of the teacher evaluation approaches emphasize using pre-and postmeasures of student learning to assess improvement or gains. The approaches to measuring student achievement vary from teacher-developed to standardized tests , but in every case, data are used as only one of multiple measures of teacher effectiveness. The student achievement information is used primarily for the purpose of better focusing instruction and fostering professional development. Conclusion Teacher evaluation is a major component of the educational agenda today. Although observation and evaluation of teachers have traditionally represented a major responsibility of principals and other supervisors, these functions have become even more significant in today’s era of accountability. Clearly, paying closer attention to teaching practices and their effects on student learning has become standard practice in an effort to improve the quality of teaching and learning. In addition, teachers today are encouraged to take major responsibility for their own professional development. In an evaluation system that (1) supports continued professional growth and (2) ensures accountability for the school and the school system. More systematically organized information on student learning can support both goals as well as enhance the evaluation process.
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