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Enrollment Patterns - Sources and Methodology

Student-level enrollment and home addresses: SY2013-14 through SY2018-19 OSSE Audited Enrollment. The following audited enrollment business rules were applied to the audited enrollment files for SY17-18 and SY18-19: 1) The universe of DCPS students include audited UPSFF residents + Non-resident tuition paying +  Residency unverified and 2) The universe of public charter students include audited UPSFF residents. Student level data was geocoded by the Office of the Chief Technology Officer with all District-appropriate neighborhood geographies and DCPS boundary rights from the Electronic Boundary Information Rights appended to each student. Home addresses reflect students’ residences provided at the time of registration. Registration can occur between the spring prior to the start of the school year up until the enrollment audit, approximately October 5th of the current school year.

Distance to school: The  DME calculated the distance between students’ addresses per the audited enrollment file and where they attended school at the facility level as of the audited enrollment file. Distances were calculated using ArcGIS’s geo-spatial network analyst tool that takes into account Washington, DC’s streets and walkways provided by the DC Office of Planning. The file excludes non geocoded students or those students that could not be assigned a ward or neighborhood cluster.

School facility addresses: School facility addresses were verified with District of Columbia Public Schools and the DC Public Charter School Board. School facility addresses were geocoded by the Office of the Chief Technology Officer with all District-appropriate neighborhood geographies included. The DME related the OSSE Audited Enrollment, SY2013-14 through SY2018-19, to individual facilities based on grades served. In instances where multiple facilities served the same school’s grade configurations then the distance to the facility with the highest enrollment was used.

OSSE School Transparency and Reporting (STAR) Framework:

The STAR Framework provides an overall school performance rating from 1 to a 5 stars based on an overall school performance score (1 STAR being the lowest and five the highest). STAR calculates an overall school performance rating using measures of academic achievement, student growth, school environment, English language proficiency, and graduation rates for student groups in the school. The STAR Framework first measures a school’s performance for all students for each of the applicable metrics and then measures performance for students with disabilities, students who are at-risk, English learners, and each racial/ethnic group in the school with more than ten students. Schools that serve exclusively adults, exclusively students in grades PK3 thru grade 2, schools that are new, and schools that serve small numbers of students (below the threshold for student data privacy protections) do not receive STAR ratings. In 2018, 203 out of 235 schools in DC earned a STAR rating. In 2019, 206 out of 239 schools in DC earned a STAR rating. See OSSE’s 2018 and 2019 Framework Briefs and Technical Guides for more information.

Enrollment is aggregated at the grade band level (PK3-5, 6-8, 9-12, Adult, Alternative, and SPED) for each school. However, not every grade band and its associated enrollment has its own Framework Score and Framework Rating. For example: if a school's enrollment spans grades 5th-12th, the school would have enrollment for three grade bands, Elementary, Middle, and High. However, the school would only be rated under two frameworks under the STAR Rating system: Middle and High. In these cases, the other grade band and its enrollment is assigned the Framework, including the Framework Rating and Score, under which those students were rated. In the case of the example, the 5th grade students were rated under the Middle Framework, but their enrollment will be included in the elementary count when the dashboard is filtered by grade band for Elementary (PK3-5).