New York State Scores 2011—2012 School Year

Growth Ratings and Score Ranges Growth RatingDescriptionGrowth Score Range (2011–12) Highly EffectiveWell above state average for similar students 18–20 EffectiveResults meet state average for similar students 9–17 DevelopingBelow state average for similar students 3–8 IneffectiveWell below state average for similar students 0–2

Key Points about NYS Growth Measures – We are measuring student growth and not achievement – We are measuring growth compared to similar students A student who received the same exact score on the previous year’s assessment in that subject – All of the students in a teacher’s class are compared to their similar counterparts to get a growth percentile (SGP). For example, a student with an SGP of 48 has performed the same or better than 48% of similar students (those who received the same score in the prior year) in New York State on the current year’s assessment.

ELA Scale Score Student A 450 High SGPs Low SGPs Student A’s Current Year Performance Compared to “Similar” Students If we compare student A’s current score to other students who had the same prior score (450), we can measure her growth relative to other students. We describe her growth as a “student growth percentile” (SGP). Student A’s SGP is the result of a statistical model and in this example is 45, meaning she performed better in the current year than 45% of similar students.

SGPs for Ms. Smith’s Students Ms. Smith’s Class Prior ScoreCurrent ScoreSGP Student A Student B Student C Student D Student E

Adjusted Mean Growth Percentile – The growth percentiles of all the students in the class are averaged in order to come up with the Unadjusted Mean Growth Percentile – The Adjusted Mean Growth Percentile is derived by factoring in additional elements in order to ensure comparison with similar students. Economic Disadvantage SWD ELL status – For evaluation purposes, the overall adjusted MGP is used.

ELA Scale Score Studen t A 450 High SGPs Low SGPs Expanding the Definition of “Similar” Students to Include Economically Disadvantaged—An Example Now if student A is economically disadvantaged, we compare student A’s current score to other students who had the same prior score (450) AND who are also economically disadvantaged. In this new comparison group, we see that student A now has an SGP of 48.

From Student Growth to Teachers and Principals Ms. Smith’s Class SGP Student A45 Student B40 Student C70 Student D60 Student E40 To measure teacher performance, we find the mean growth percentile (MGP) for his or her students. To find an educator’s mean growth percentile, take the average of SGPs in the classroom. In this case: Step 1: =255 Step /5=51 Ms. Smith’s mean growth percentile (MGP) is 51, meaning on average her students performed better than 51% of similar students. A principal’s performance is measured by finding the mean growth percentile for all students in the school.

MGPs and Statistical Confidence 87 Confidence Range Upper Limit Lower Limit MGP NYSED will provide a 95% confidence range, meaning we can be 95% confident that an educator’s “true” MGP lies within that range. Upper and lower limits of MGPs will also be provided. An educator’s confidence range depends on a number of factors, including the number of student scores included in his or her MGP and the variability of student performance in the classroom.

A Confidence Range Example Number of Student Scores Percent above State Median Unadjusted MGP Adjusted MGP Lower Limit Upper Limit Math Grade ELA Grade

How Overall Scores are Calculated The State uses the teacher’s overall adjusted MGP (the MGP that combines information across all applicable grade levels and/or subjects taught)

Teacher-level Report District X School #1 Jane Eyre Teacher 1D’s Growth Score and Growth Rating are listed here Teacher 1D has a higher adjusted MGP in Math than ELA Teacher 1D does not have any growth data reported for any of the subgroups because 16 student scores are required to report any data Jane’s MGP = 47 (this is what is used to determine the growth score and growth rating) Jane’s Upper Limit = 55 and Lower Limit = 39

From MGPs to Growth Ratings: Teachers Rules on last slide result in these HEDI criteria for Yes No Is your MGP ≥ 69? Is your Lower Limit > Mean of 52? Highly Effective: Results are well above state average for similar students Is your MGP ≤ 35? Is your Upper Limit < 44? Ineffective: Results are well below state average for similar students Developing: Results are below state average for similar students No Effective: Results equal state average for similar students Mean Growth Percentile Confidence RangeHEDI Rating Is your MGP 42-68? Any Confidence Range Yes No Is your MGP 36-41? Is your Upper Limit < Mean of 52? Yes No

An Example Number of Student Scores Percent above State Median Unadjusted MGP Adjusted MGP Lower Limit Upper Limit Teacher A: Math Grade Teacher B: ELA Grade For Teacher A: Adjusted MGP is in the range of 42—68; score is automatically effective For Teacher B: Adjusted MGP is in the range of 36—41, so we look at the upper limit. Upper limit is less than 52; therefore the result is developing

An Example TEACHER: JOHN DOE Number of Student Scores Percent above State Median Unadjusted MGP Adjusted MGP Lower Limit Upper Limit Math Grade ELA Grade For Math: MGP is below 35; score is automatically ineffective For ELA: MGP is in the range of 42—68, so we look at the upper limit; score is automatically effective. The teacher’s overall score, however, takes into account both subjects and this teacher was rated as developing.