Last year, students in Washington DC sat for exactly 6,750 tests. The average American student takes approximately 112 tests between pre-K and twelfth grade (yes, pre-K, when one’s senses of space, self, and time are still developing).

Those figures are out this week from the DC-based Council of the Great City School (CGCS), which conducted a comprehensive two-year study documenting the types, uses, and frequency of the city’s standardized tests. Decades into a relentlessly ambitious program of testing and accountability for America’s school children, we finally have data on the data.

Produced by an organization whose corporate advisory group counts Apple and Pearson (hardly radical anti-testing voices) among its members, the report finds that state tests are redundant, with multiple tests being administered at the same time to evaluate the same things; that they “do not tell us everything that’s important about a child”; and that they are being used for purposes for which they were not designed.