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The sgptData_LONG dataset is an anonymized panel data set with 8 windows (3 windows annually) of assessment data in LONG format for 3 content areas (Early Literacy, Mathematics, and Reading). There are 7 required variables when using the sgptData_LONG with SGP analyses: VALID_CASE, CONTENT_AREA, YEAR, ID, SCALE_SCORE, GRADE, and ACHIEVEMENT_LEVEL. The last two are demographic/student categorization variables used for student aggregates by the summarizeSGP function.
A student’s SGP is the percentile of their growth relative to their academic peers. The SGP represents a student’s performance in one year compared to a single point in their history, so a change in the SGP from a previous year to this year is a measure of progress toward the goal of proficiency. The SGP is normalized so that the scale scores of all students are on a common scale from 0 to 100. The statewide SGP distribution is expected to be a bell-shape curve, with approximately equal numbers of students in each decile.
Starting in the fall of 2019, districts can view SGPs for all students in grades 4 through 11 in the Star Student Profile/Growth dashboard. This includes growth graphs for student SGPs for all MCAS assessments and grades in high school. In addition, the sgpTData_LONG dataset is now available to support district analysis of the student growth information for high school students.
The sgpData_LONG dataset contains a record for each student for all MCAS assessments since the spring of 2012. Each row has an ID, a date, and a value for the student’s assessed content area. The data also provides a column for the student’s achievement level on each assessment. The sgpData_LONG also contains the same student aggregates for each year that the sgpTData_LONG does.
When a teacher generates a Star Growth Report, the report customization screen allows them to select prior or current school years from the Timeframe drop-down menu. The SGPs for those selected years are then calculated and displayed in the report. The SGPs for all other students are based on the average of the state-wide distribution of SGPs. A summary of this distribution is shown in the chart below. This shows that the average SGP for students in 5th grade is 65, which is roughly the midpoint of the state’s distribution. Students in this range have scored at or above the 65th percentile for both ELA and math on the most recent MCAS administration. A similar chart is shown for 10th grade. Note that the chart does not include the 2014-15 year, which was omitted due to data challenges and differences from the WKCE and Forward Exam assessments that preceded it.