What is Academic Performance Index (API)?

The API is a single number, ranging from a low of 200 to a high of 1000, that reflects a school’s, an LEA’s, or a subgroup’s performance level, based on the results of statewide testing. Its purpose is to measure the academic performance and growth of schools.

The API is calculated by converting a student’s performance on statewide assessments across multiple content areas into points on the API scale. These points are then averaged across all students and all tests. The result is the API.

(Quoted from California Department of Education)

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