Many school districts have developed their own rubrics for this purpose, such as the IMPACT system used in the District of Columbia public schools.[10] Other practice-based assessments of teacher quality require teachers themselves to assemble evidence and self-assess their own indicators of teacher quality according to rubrics as part of the process. Examples include the Performance Assessment for California Teachers (PACT)[11] and its national successor the edTPA,[12] the Oregon-based Teacher Work Sample.[13] and the collection of assessments required by teachers seeking certification from the National Board for Professional Teaching Standards.