With multiple sources of information available, knowing how to use data efficiently and effectively with limited resources is critical to the successful implementation of school-wide, classroom, and individual interventions. In this practice guide, we describe a scientifically-based approach for data-based decision-making called Team-Initiated Problem Solving (TIPS) that includes guidance for school-based teams on (a) the foundations needed to run more effective meetings; (b) a process for using data to identify school needs and goals for change as well as for planning practical and effective solutions; and (c) a process for using, monitoring, and adapting solutions.