We used time-varying effect modelling of two very large samples of fourth-grade students (N[subscript reading] = 148,240, N[subscript mathematics] = 152,220) to investigate associations between adoption and over-time implementation of a de facto cap on special education service receipt and over-time likelihoods of disability identification from…

In many ways standards-based school reform is at a crossroads. On one side, the movement has made tremendous strides. The Common Core State Standards Initiative, known simply as Common Core, is now strongly established in more than 40 states. Many teachers believe that the new, higher academic standards have helped them improve instruction. And,…