By Denise Kish
Director of Academic Services, Eidex

Beginning the 2018-19 school year, student growth and assessment data must account for 40% of the annual teacher evaluation. For teachers of grades and content areas measured by state assessments, half of the student growth portion of the evaluation must be based on the state assessments. Although the MDE provides districts with individual Student Growth Percentiles (SGPs) for this purpose, it is up to the district or PSA to decide what is the most appropriate growth measure and assign an accurate rating to educators in their districts. For teachers of non-tested grades and subjects, multiple research-based measures or alternative assessments that are rigorous and comparable across schools must be used to determine student growth.

Because of the autonomy school leaders have in calculating educators’ effectiveness ratings, it is beneficial to know and understand the various growth measures available. The measures briefly discussed in this article include Student Growth Percentiles (SGPs), Adequate Growth with Standard Error (AGSE), Student Learning Objectives (SLOs), and Conditional Growth Percentiles (CGPs).

SGP¹ is the measure MDE recommends for some tested grades and subjects, but not high school. A student’s SGP communicates his or her progress in a subject, compared to a group of academic peers with a comparable score on the previous test(s) in that subject. If a student receives an SGP of 50 on the M-STEP, it means that the student demonstrated growth in the content area equal to or greater than half of their academic peers.

AGSE² is an alternative to SGP in measuring students’ growth on the M-STEP as well as the SAT/PSAT. Adequate Growth measures how much growth a student needs to consistently attain to be on the path to reach, or maintain, proficiency within a set timeframe. Unlike SGP, AGSE considers both a student’s existing proficiency level and growth when determining whether the student has met their growth target and tends to be more intuitive for educators.

SLO³ is a measurable, long-term, data-informed academic goal set by a teacher for all students or a subset of students. SLOs can be used to measure growth for teachers of both tested and non-tested grades and subjects. Several advantages of using SLOs includeteachers’ active participation in their evaluations by setting SLOs, flexibility in implementation across tested and non-tested grades and subjects, adaptability with new standards, and vendor-provided or teacher-made assessments.

CGP is another way to measure a student’s academic growth, specifically on the Measures of Academic Progress (MAP®) assessment administered by NWEA. CGPs communicate a students’ growth compared to a “norm” group consisting of students with comparable scores on previous test(s). CGPs are like SGPs in that a student with a CGP score of 50 has demonstrated growth equal to their norm group.

Regardless of the statistical model your team has chosen, we understand the need for an efficient process, so you can save time and refocus your effort to improve instruction in the classroom. Eidex® has partnered with leading organizations to develop automated calculators that easily aggregate growth data over three years and attribute thousands of effectiveness ratings in seconds. If you wish to ditch hefty spreadsheets and speed up your evaluation calculations, please don’t hesitate to visit our website at and contact us about our calculators. We are also holding various workshops and webinars on student growth across the state, visit the Events section on our website to register and learn. More resources including webinar recordings and guidebooks can also be found on our website. Happy learningand we wish you the best on your annual evaluations this year!

Denise Kish is Director of Academic Services for Eidex. Contact her at or 989.295.2073.


  • ¹Eidex’ SGP calculator developed in partnership with Colin Ripmaster, Associate Director of MASSP, and Brian Lloyd, Student Growth Consultant at MDE
  • ²Eidex’ Adequate Growth calculator development was guided by Doug Greer, Director at Ottawa Area ISD
  • ³Eidex’ SLO calculator designed in collaboration with Colin Ripmaster, Associate Director of MASSP