/tags/education-ohio-stateimpact-teacher-grades-teacher-standards-value-added education ohio stateimpact teacher grades teacher standards value added en-US Copyright Mon, 17 Jun 2013 12:13:36 GMT /news/2013-06-17/value-added-grading-teachers-through-student-growth Schools get rated based on how well students perform on standardized state tests. Not so for teachers. Their main evaluation comes from often brief… Mon, 17 Jun 2013 12:13:36 GMT /news/2013-06-17/value-added-grading-teachers-through-student-growth admin