Since the 1999 Base API, Key Data Systems has aggressively developed and maintained a highly reliable system for processing your data into accurate reports and rapidly delivering these reports to you.
While only the California Department of Education (CDE) can issue official APIs and AYPs, we calculate estimates based on API algorithms and the CDE Accountability Workbook to consistently match exactly, or within a few points of, CDE computations.
We test our algorithms by comparing them to manual computations by data professionals. We continuously test to make sure that our algorithms are stable and as accurate as possible.