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California Department of Education Finally Correcting Dublin High School Data Errors

October 15, 2012

For those that closely follow Dublin High School‘s performance via metrics published by the California Department of Education (CDE), persistent data errors from 2010 have complicated year-over-year, longitudinal and cohort data comparisons. The CDE has confirmed in writing (see below) that the errors will finally be corrected. According to Dublin Unified School District Superintendent Dr. Stephen Hanke in a statement made earlier this year, “The district migrated to a new student data reporting system in fall 2010 and due to an error in the migration, enrollment data for Dublin High School was incorrectly reported. This inaccuracy was reported to the California Department of Education’s California Longitudinal Pupil Achievement Data System (CALPADS) office in December 2010.”

The incorrect enrollment data distorts Dublin High School’s cohort graduation rates for 2009-10 and 2010-11 (as per the letter from the CDE below) making the currently published analysis unreliable. The published reports are scheduled to be updated in January. The currently published reports were last updated a year ago (October 2011).

Full text of the California Department of Education Letter to the Dublin Unified School District Oct 2012:

October 9, 2012

Dr. Stephen Hanke, Superintendent
Dublin Unified School District
7471 Larkdale Ave.
Dublin, CA 94568-1500

Dear Superintendent Hanke,

This letter is to notify you that the Academic Progress Reports to be released this month will not factor in the data corrections that your staff has been working on and has already submitted to CALPADS. My staff has viewed the Operational Data Store within CALPADS and I can confirm that your staff has made corrections to both 2009-10 and 2010-11 data that will improve your cohort graduation rate.

Unfortunately, we are not scheduled to update the four-year cohort graduation rate until November when all districts have had an opportunity to make corrections. The final rates will be recalculated for all schools and posted publicly on the CDE Web site in January.

Because these are cohort graduation rates, we cannot calculate them for a single school or district – the data are longitudinal and one school’s data can impact another school’s data. Therefore, the calculations must wait until we have corrections from all schools. Your 2009-10 and 2010-11 data corrections are already contained in CALPADS. There is nothing more required of the school district at this time, but to await the recalculation of the rates.

I understand that you will need to reach out to your education community and try to explain the complexity of these new cohort rates and why the data contained in the new release of the Academic Progress Reports is not yet an accurate representation of your high school graduation rate.

I am willing to help discuss these issues or answer any questions from your staff, your local governing board or your community. I can be reached directly by telephone at 916-323-5007 or by e-mail at


Keric Ashley, Director
Educational Data Management Division
California Department of Education


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