Teachers commonly rely on many sources of information to diagnose student needs and to identify the most-appropriate resources to support those needs. In this Data Note, the authors use nationally representative survey response data from the 2021 Learn Together Surveys (LTS) to examine how secondary teachers leverage different types of information to guide them to the supports and interventions that they use in the classroom. Drawing on responses from 3,605 6th- to 12th-grade teachers, the authors focus their discussion on survey items from the "Supporting Struggling Students" and "Sources of Information and Support" portions of the survey. They compare teacher responses across various school-level characteristics, including school free and reduced-price lunch enrollment, percentage of non-white students, and school locale, and various self-reported teacher-level characteristics, such as main subject taught, grade band taught, race/ethnicity, and their school's mode of instruction during the 2020-2021 school year. The authors conclude with implications and policy recommendations based on their analysis.