In the late 1600s, British physicist Sir Isaac Newton first demonstrated refraction and dispersion in a triangular prism. He discovered that a prism could decompose white light into a spectrum. Hold a prism up to the light at the correct angle and white light magically splits into vivid colors of the rainbow! So what do prisms and rainbows have to…

Reliable and current data is the foundation upon which good public policymaking is built. While California collects a good deal of data on its teaching workforce, policymakers have lacked a state-level data and analysis system to provide answers to even some of the most basic questions: How many credential holders actually take jobs? In what types…