Katrina S. Blowitz

A 5th grade teacher at Angeles Mesa Elementary in 2010

These graphs show a teacher's "value-added" rating based on his or her students' progress on the California Standards Tests in math and English. The Times’ analysis used all valid student scores available for this teacher from the 2003-04 through 2009-10 academic years. The value-added scores reflect a teacher's effectiveness at raising standardized test scores and, as such, capture only one aspect of a teacher's work.

Math effectiveness

Least effective
Most effective

English effectiveness

Least effective
Most effective
See how this teacher would change under different statistical models »

About this rating

The red lines show The Times’ value-added estimates for this teacher. Blowitz falls within the “most effective” category of district teachers in math and within the “most effective” category in English. These ratings were calculated based on test scores from 150 students.

Because this is a statistical measure, each score has a degree of uncertainty. The shading represents the range of values within which Blowitz’s actual effectiveness score is most likely to fall. The score is most likely to be in the center of the shaded area, near the red line, and less likely in the lightly shaded area. Teachers with ratings based on a small number of student test scores will a have wider shaded range.

The beige area shows how the district's 11,500 elementary school teachers are distributed across the categories.

Blowitz's LAUSD teaching history

Years used for value-added rating. See FAQ for details.

Katrina Blowitz's Response:

This year, my administrator has departmentalized the school in grades 2-5 (each teacher teaches only one subject, just like middle school and high school). Therefore the students on MY 5th grade roster are receiving instruction in math from a teacher other than myself. The instruction they are receiving from this teacher will be reflected in this year's CST. If their scores drop in math, it will appear as if this is due to my instruction. I am highly concerned and do not want my value added rating posted if it does not truly reflect my instruction.
Katrina Blowitz


The Times gave LAUSD elementary school teachers rated in this database the opportunity to preview their value-added evaluations and publicly respond. Some issues raised by teachers may be addressed in the FAQ. Teachers who have not commented may do so by contacting The Times.

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Los Angeles Teacher Ratings, the Los Angeles Times' database of value-added scores for Los Angeles Unified elementary schools and teachers.

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This page was created by the Data Desk, a team of reporters and Web developers at The Times.