This document discusses how formative assessment can be used in high school library media centers. It provides examples of online tools that can be used for assessments, including TRAILS-9 for information literacy skills, NoodleTools for citation skills, tutorial videos, and Google Forms for various types of assessments. Assessments described include content and technology skills, research process and information literacy, resource evaluation, technology skills, professional development, collaboration, and parental skills. Reasons for doing assessments include advocacy, data collection, reports, feedback, and teacher evaluation. Contact information is provided for further details.