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Seattle Public Schools Research, Evaluation & Assessment

3-Year Elementary Math Achievement Data (Schmitz Park)

Seattle Public Schools (SPS) analyzes student achievement data from the MSP state assessment, which is administered annually to all students in 3rd

to 8th

grade. Two types of

measures based on MSP results are considered. The first measure is a Proficiency Index, which is a summary average of student performance levels (1 to 4) achieved by

students at the school. (Level 1 = well below standard; Level 2 = below standard; Level 3 = meets standard; Level 4 = exceeds standard) A proficiency index is an average that

ranges from a minimum of 1.00 to a maximum of 4.00. The second measure is a Median Student Growth Percentile (SGP), which is the median growth achieved by students

at the school. (Each SGP is a percentile ranking [1-99] indicating how well the student performed compared to his/her academic peers across the state i.e., students with the

same achievement in previous years. An SGP is considered a growth metric because it measures a students achievement in comparison to how they performed in the past.)

To measure whether aggregate achievement is typical(average) or atypical(significantly above or below average) for a given school, SPS compares the schools achievement

to the achievement of other schools across Washington State with similar demographics for enrolled students. To identify similar schools for comparison, SPS uses statewide

data to employ a statistical model that generates a School Characteristics Index (SCI) for each schoolderived fromdemographics factorswhich include enrollment size, % of

students by ethnicity, % students eligible for free or reduced-priced meals, % English language learners, % special education students, and % gifted/highly capable students.

The table below provides Proficiency Index and Median SGP results for Schmitz Park Elementary School for the past three years. Results are provided for all enrolled students

(grades 3rd

to 5th

) and for the subset of students eligible for free or reduced-priced meals at Schmitz Park. The table includes the average for similar schools statewide for each

metric and student group. SPS employs a statistical test (T-Test) to measure if the observed difference between the school result and the similar school average is statistically

significant, and at what confidence level (see note below table). A significant result indicates the difference was unlikely to have occurred based solely on random factors.

In addition, Schmitz Park results are compared to a subset of similar SPS schools who are in the same statewide similar schools cluster as Schmitz Park and also are known to

have implemented the District adopted elementary mathematics textbook (EDM). SPS comparison schools for the Schmitz Park analysis include: Bryant Elementary, John Hay

Elementary, Laurelhurst Elementary, Loyal Heights Elementary, West Woodland Elementary, and Catharine Blaine K-8, McGilvra Elementary*

*McGilvra began using enVisions in January of 2013. The 2.5 years prior they were implementing EDM.

Measure Group # Students

School

Result

Similar

Schools

Average

(WA State) Difference

Statistical

Significance

(T-Test)

Similar

Schools

Average

(SPS Only) Difference

Statistical

Significance

(T-Test)

All Students 554 3.07 3.09 -0.01 not signif. 3.34 -0.27 **

FRL Students Only 70 2.46 2.59 -0.13 not signif. 2.68 -0.22 *

All Students 347 49.86 51.44 -1.57 not signif. 53.58 -3.72 *

FRL Students Only 40 37.93 46.85 -8.92 * 49.16 -11.24 **Median SGP

Profici ency Index

* Significant at p