Better Governing Now » CommenTerry: Volume Sixty-Seven


CommenTerry: Volume Sixty-Seven

    Publisher's note: The author of this post is Dr. Terry Stoops, who is the Director of Education Studies for the John Locke Foundation.

The best and worst schools in NC last year

    Last week, the N.C. Department of Public Instruction released student performance data for all schools and school districts in the state. The release included school performance grades, end-of-course and end-of-grade achievement level results, school accountability growth data, the 4-year and 5-year cohort graduation rates, and a number of other metrics that give North Carolinians an imperfect but valuable estimation of the health of our public schools.

    My preferred measure is school accountability growth or "value-added" data. Value-added assessment is a measure of student growth from one point in time to another. Naturally, we expect all students to attain at least a year's worth of academic growth through the course of each school year. The Education Value-Added Assessment System (EVAAS) is a superb tool that predicts and measures academic growth based on the performance of each student on state standardized tests.

    The major advantage of using EVAAS is that the characteristics of the student, including socioeconomic status, do not play a significant role in determining academic growth. According to EVAAS developers at SAS, "EVAAS analyses show no correlation between students' growth and their socioeconomic status. Therefore, whether students are designated economically disadvantaged or not, they are equally likely to make good progress." Thus, it is preferable to other measures, such as the school performance grades, that appear to be associated with differences in family income.

    I examined EVAAS data for the 2014-15 school year and found schools with the lowest and highest growth indices (See Table 1 and 2). Schools can meet growth expectations by earning a growth index of between -2 and +2. Schools over +2 have exceeded their growth expectation. Those below -2 have not met growth. Alternative schools were excluded from the list.

Table 1. Highest Growth Schools, 2014-2015

District Name School Name Grade Span EVAAS Growth Index
Charlotte-Mecklenburg Schools Independence High 09-12 22.08
Cumberland County Schools Jack Britt High 09-12 21.95
Charlotte-Mecklenburg Schools Community House Middle 06-08 16.35
Charlotte-Mecklenburg Schools South Mecklenburg High 09-12 16.32
Charlotte-Mecklenburg Schools Ardrey Kell High 09-12 16.09
Wake County Schools Middle Creek High 09-12 15.52
Carteret County Public Schools West Carteret High 09-12 14.85
Wake County Schools Cary High 09-12 14.85
Charlotte-Mecklenburg Schools South Charlotte Middle 06-08 14.35
Robeson County Schools Red Springs High 09-12 14.05
Asheboro City Schools North Asheboro Middle 06-08 13.90
Johnston County Schools Cleveland Middle 06-08 13.77
Charlotte-Mecklenburg Schools William Amos Hough High 09-12 13.59
Charlotte-Mecklenburg Schools Butler High 09-12 13.31
Carteret County Public Schools Croatan High 09-12 13.26

    The list of the top fifteen highest growth scores includes seven schools from Charlotte-Mecklenburg, two from Wake, and two from Carteret. Interestingly, there is a sharp contrast between the two largest school districts in the state, Wake County and Charlotte-Mecklenburg. The latter is clearly outperforming the former on EVAAS measures of student growth, despite the fact that Charlotte-Mecklenburg enrolls a much higher percentage of low-income students than Wake.

Table 2. Lowest Growth Schools, 2014-2015

District Name School Name Grade Span EVAAS Growth Index
Newton Conover City Schools Newton-Conover Middle 06-08 -17.54
Lee County Schools Lee County High 09-12 -17.35
Nash-Rocky Mount Schools Northern Nash High 09-12 -16.04
McDowell County Schools McDowell High 09-12 -15.66
Rowan-Salisbury Schools North Rowan High 09-12 -15.55
Nash-Rocky Mount Schools Nash Central High 09-12 -15.02
Nash-Rocky Mount Schools Southern Nash High 09-12 -14.35
Rowan-Salisbury Schools Erwin Middle 06-08 -13.94
Burke County Schools East Burke High 09-12 -13.90
Lenoir County Public Schools Kinston High 09-12 -13.47
Iredell-Statesville Schools Statesville Middle 06-08 -13.28
Harnett County Schools Overhills High 09-12 -12.98
Iredell-Statesville Schools West Iredell Middle 06-08 -12.64
Surry County Schools Meadowview Magnet Middle 06-08 -11.74
Rowan-Salisbury Schools West Rowan High 09-12 -11.63

    On the other hand, school performance data suggests that the schools listed above have failed to deliver a sound, basic education to the children assigned to them. The list of the fifteen lowest growth scores includes three schools from Nash-Rocky Mount, three schools from Rowan-Salisbury, and two schools from Iredell-Statesville. Taxpayers, school board members, county commissioners, administrators, and teachers in these communities have some soul searching to do.

    Accountability growth measures only capture particular state-administered grade and subject tests, including math, English Language Arts, and sometimes science. It is possible that subjects not included, such as social studies, would show more promising growth trends. It is also possible that this year's results are an anomaly for schools that experienced a change in district or school leadership.

    Indeed, value-added data are not the last word. The reasons why a school under- or out-performed its peers are best determined and addressed locally. Only when a locality chooses to disregard or dismiss accountability results should taxpayers demand corrective action from state education officials, the legislature, or the courts.

Acronym of the Week

    EVAAS — Education Value-Added Assessment System

Quote of the Week

    "North Carolina's school districts, public schools and charter schools receive web-based reporting through the Education Value-Added Assessment System (EVAAS). EVAAS offers an objective way to measure student progress and the value schools add to students' educational attainment. EVAAS is a statistical analysis of North Carolina (NC) state assessment data, and the system provides NC schools with growth data to consider, in addition to achievement data. Educators are able to make data-informed instructional decisions to ensure academic growth and achievement of all students by using EVAAS."

    — SAS and the N.C. Department of Public Instruction, "About EVAAS"

CommenTerry: Volume Sixty-Six John Locke Foundation Guest Editorial, Editorials, Op-ed & Politics CommenTerry: Volume Sixty-Eight