This document outlines techniques for using student voices and data-driven decision making to improve schools. It discusses Photolanguage, an innovative process using black and white photos to stimulate reflection. Data-in-a-Day is also introduced, which involves collecting data from multiple stakeholders over the course of a day to facilitate dialogue about improvement strategies. Guidelines are provided for analyzing data to identify themes, determine program effectiveness, and guide decisions. The goal is for evaluators and schools to work collaboratively to understand challenges and make ongoing improvements based on consensus.