Student Growth Percentile (SGP) Data is now available publicly on the OSPI State Longitudinal Data System (SLDS). To access the data from OSPI’s homepage, click on the “K-12 Data & Reports” button on the right-hand side, then click on “Static Data Files”. Under the “Assessment” menu item, you can scroll down to find the SGP files and reports.
SGPs at a Glance
A short overview of SGPs
Understanding a Student Growth Percentile Report
A Guide for Parents and Teachers
What is an Academic Peer?
Illustrated slides on what an academic peer group is and the way that student assessment data is used to create a student growth percentile.
How To Interpret Student Growth Reports
Slides on how to interpret Student Growth Reports for the 2014-15 school year.
Two Year Growth Targets and Catch-Up, Keep-Up Definitions (PDF)
Illustrated slides on proficiency targets
2013 Washington Growth Model Report
This report, written by the developers of the SGP model for Washington, provides summary statistics on the 2013 SGPs and details on how student growth percentiles and growth-to-standard targets are calculated.
Webinar: Interpreting and Using the State Growth Measure in Washington Schools
OSPI hosted a webinar on April 15 for school principals, featuring Karen Owen, Principal of Nisqually Middle School and Sarah Rich, Assessment Director of North Thurston Public Schools. The panelists discussed using SGPs in student conferences, professional learning communities and for benchmarking purposes at the district level.
Webinar: An Introduction to SGP
36-minute video introduction to student growth percentiles - March 2013
Details the student growth percentile files and reports that can be found in EDS through the Washington Assessment Management System application. The files are located under Profile > File Downloads > 2013 Administration > 7. Student Growth Percentiles (SGP).
SGP Reports: What Districts Can Expect to See (Time: 7:20)
Guide to SGP Files on WAMS 2014-15 (PDF)
Guide to SGP Files on WAMS 2013-14 (PDF)
Guide to SGP Files on WAMS 2012-13 (PDF)
Guide to SGP Files on WAMS (2010-11 and 2011-12)
Growth Model Comparison Study
Council of Chief State School Officers (CCSSO).
Cade, B and Noon, B. 2003. A gentle introduction to quantile regression for ecologists. Frontiers in Ecology and the Environment. 1(8): 412 – 420.
A Technical Overview of the Student Growth Percentile Methodology
Paper by Damian Betebenner from the National Center for the Improvement of
Educational Assessment for New Jersey.