Student Growth Percentiles: Norm- and Criterion-Referenced Growth for Interim Assessments

CCSSO · June 28, 2012

Student Growth Percentiles: Norm- and Criterion-Referenced Growth for Interim Assessments — CCSSO, June 28, 2012.
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June 28, 2012

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  1. The Big Picture Student Growth Percentiles and Accountability Future Directions References Student Growth Percentiles: Norm- and Criterion-Referenced Growth for Interim Assessments Damian W. Betebenner National Center for the Improvement of Educational Assessment Dover, NH CCSSO National Conference on Student Assessment Minneapolis, MN June 28, 2012 Damian W. Betebenner SGP: Growth for Interim Assessments
  2. The Big Picture The Data Revolution Student Growth Percentiles and Accountability Describing Student Growth Future Directions Student Growth Percentiles References From a Paucity to a Plethora of Data Data Data Everywhere (The Economist, 2010) More and better organized data: mega, giga, tera, peta, exa, zetta, yotta! Historical records of student achievement. Linkage of student achievement to student demographics, teachers, schools, educational programs, . . . Stakeholder interest in examining student achievement over time (student growth) derives from data availability. Damian W. Betebenner SGP: Growth for Interim Assessments
  3. The Big Picture The Data Revolution Student Growth Percentiles and Accountability Describing Student Growth Future Directions Student Growth Percentiles References Describing Student Growth Measuring student growth, even with a vertical scale, is not a simple task. Some believe a vertical scale simplifies the task of measuring student growth. Even with an interval (or ratio) scale, growth is not easy to interpret. Consider, for example, height. A child might grow 4 inches between ages 3 and 4. 4 inches is a well understood quantity. The 4 inch increase becomes really meaningful only when understood alongside the growth of other 3 to 4 year olds. Student growth percentiles were developed to provide a normative context for describing student growth. Damian W. Betebenner SGP: Growth for Interim Assessments
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  14. The Big Picture The Data Revolution Student Growth Percentiles and Accountability Describing Student Growth Future Directions Student Growth Percentiles References Student Growth Percentiles Should we be surprised with a child’s current achievement given their prior achievement? Student growth percentiles answer this question. Consider a low achieving student with 75th percentile growth and a high achieving student with 25th percentile growth. The low achieving student grew at a rate exceeding 75 percent of their academic peers. The high achieving student grew at a rate exceeding just 25 percent of their academic peers. The low achiever’s growth is more exemplary (probabilistically) than the high achiever’s. Judgments about the adequacy of student growth require external criteria. Damian W. Betebenner SGP: Growth for Interim Assessments
  15. Advanced Reading High Achievement CSAP Reading ● Typical Scale Score Proficient Growth Low ● Level Percentiles High 66th − 99th Typical 35th − 65th Part Proficient ● Low 1st − 34th Unsatisfactory Grade 3 Grade 4 Grade 5 Grade 6 Next Year Scale Score 462 539 563 609 Achievement Level Unsatisfactory Part Proficient Part Proficient Proficient Achievement Growth Percentile 66 66 90 Growth Level High High High Growth
  16. The Big Picture Student Growth Percentiles and Accountability Future Directions References Growth and Accountability Accountability (RttT/ESEA waivers) has been a large impetus to the development of growth/value-added methodology. Student growth results enable multiple uses including diagnostic. High stakes consequences can corrupt measures. This is true of growth results derived from both large scale and interim assessments. Striking the perfect balance between diagnostic utility and accountability is critical but difficult. Damian W. Betebenner SGP: Growth for Interim Assessments
  17. The Big Picture Student Growth Percentiles and Accountability Data use is key Future Directions References Data is more than a judgment Data as a window and a mirror Damian W. Betebenner SGP: Growth for Interim Assessments
  18. The Big Picture Student Growth Percentiles and Accountability Future Directions References References The Economist and Cukier, K. (2010). Data data everywhere. Damian W. Betebenner SGP: Growth for Interim Assessments