This brief provides a summary of the validity of Istation ISIP Early Reading scores in predicting students' performance levels on the Idaho Standards Achievement Test (ISAT) in English language arts (ELA). This correlational study analyzed how well third grade students' winter performance on the ISIP Early Reading test predicted their spring performance on the ISAT ELA. Because ISIP Early Reading became the state of Idaho's mandatory early literacy assessment at the start of the 2018-19 school year for students in grades K-3, the ISIP was administered to all third grade students in Idaho. [Istation contracted with the CRRE at JHU to conduct a study of the predictive validity of Istation's Early Reading (ER) program in the state of Idaho. For the full technical report, see ED611345.]