Student Growth Percentiles (SGPs)
Student Growth Percentiles (SGPs) represent one powerful way to quantify the learning of individual students over one or more years. Conceptually, SGPs communicate the degree to which a student has learned in a particular domain, compared to a group of academic peers who had a comparable score on the previous test (or multiple previous tests) in that subject. In order to calculate SGPs, students are grouped with academic peers throughout the state who had comparable score patterns on past tests. Students in each academic peer group are then ordered based on their score on the current year test. Each student then receives a percentile rank, compared to their academic peers. Like other percentile scores, SGPs range from 0-99, where a SGP of 50 indicates that the student demonstrated growth in the content area equal or greater to half of the students with comparable score histories on that subject-matter test.
This document provides step-by-step instructions on how to access and calculate a mean SGP to determine an educator evaluation student growth rating for state assessment data using a Microsoft Excel tool developed by the MDE.
The MDE SGP Educator Evaluation Calculator Tool is designed to automate calculations consistent with the policies recommended by the Michigan Department of Education, and the use of this tool is recommended for the use of state assessment data to determine student growth ratings for educator evaluations.
This document provides an overview of student growth percentiles.
This document provides a policy brief for Student Growth Percentiles in Michigan.
Where can Student Growth reports using SGPs be viewed?
How are SGPs used in school accountability?
Student Growth Percentiles are used in the diagnostic School Scorecards, where students obtaining high SGPs are considered "growth proficient" or on track to be obtaining proficiency. SGP use in the scorecard is detailed on page 15 in the Scorecard Guide.
Student Growth Percentiles are used in the Top-to-Bottom Overall School Rankings to measure relative student improvement among all schools statewide. SGP use in school rankings is detailed on the School Rankings webpage.
Additional Student Growth Percentiles Information and Resources
A Technical Overview of the Student Growth Percentile Methodology: This technical paper provides a detailed explanation of the statistical methodology used to calculate student growth percentiles.
Videos that provide information about Student Growth Percentiles:
For more information on how SGPs could be used in evaluation, please contact Brian Lloyd at 517-373-0739 or MDE-EdEvals@michigan.gov.
For information on how SGPs are used in Michigan's school accountability systems, please contact 877-560-8378 or MDE-Accountability@michigan.gov.