The High School Tiered Interventions Initiative (HSTII) is a collaborative effort among the National Center on Response to Intervention, the National High School Center, and the Center on Instruction that explores how RTI and tiered interventions are being implemented at the high school level. During this webinar, Dr. Kristen McMaster provided an overview of Curriculum-Based Measurement (CBM), including the purpose, a brief description of research, and a demonstration of how CBM data can be used to monitor student progress. She reviewed CBM tools that are available for high schools in reading, mathematics, and the content areas, and provided instructions for developing CBM tools for use at the high school level. Following Dr. McMaster's presentation of CBM in high school, representatives from Walla Walla High School in Walla Walla, Washington, discussed how they have monitored school progress as part of their tiered intervention model. This presentation is suitable for anyone interested in the researcher and practitioner perspectives of RTI and progress monitoring at the high school level.