The Massachusetts Department of Elementary and Secondary Education (Department) created the grades 1-12 Early Warning Indicator System (EWIS) in response to district interest in the Early Warning Indicator Index (EWII) that the Department previously created for rising grade 9 students. Districts shared that the EWII data were helpful, but also requested early indicator data at earlier grade levels and throughout high school. The new EWIS builds on the strengths and lessons learned from the EWII to provide early indicator data for grades 1-12. To develop the early elementary risk model, a multilevel modeling framework was used to control for the clustering of students within schools and obtain correct robust standard errors. To develop the late elementary, middle and high school risk models, a logistic regression modeling framework was used. The model allows users to identify students who are at risk of missing key educational benchmarks (a.k.a. outcome variables) within the first through twelfth grade educational trajectory. The outcome variables by which students' risk is tested took into consideration the degree to which the outcome variable is age and developmentally appropriate (e.g., achieving a score that is proficient or higher on the third grade English Language Arts in Massachusetts Comprehensive Assessment System). The following appendices are included: (1) Seventh Grade: Alternate Risk Model--No Course Performance Data; (2) Eighth Grade: Alternate Risk Model--No Course Performance Data; and (3) Ninth Grade: Alternate Risk Model--No Course Performance Data.