This document describes a study that used student performance on common district assessments to predict scores on high-stakes state tests. The study found moderate to strong correlations between common assessment scores and later state test scores. It then used a six-step process to generate algorithm-based predictions of state test scores from common assessment data, which were reviewed and refined by teachers. Teacher-refined predictions had stronger correlations to actual state scores than algorithm-based predictions alone. The study aims to help teachers and schools proactively address learning needs before state tests.