Sometimes a large-scale experimental study is not the right tool for the job. When it comes to conducting experiments on the effectiveness of specific instructional strategies in classrooms, teachers are best positioned to find out what works. Marzano Research is taking action to rethink classroom research and empower teachers to test and adjust day-to-day instruction. Instructional strategies are a unique type of intervention because their effects are observable in a relatively short period of time. As such, they are perfect candidates for teacher experiments. We bring tools that support classroom-based experiments, helping teachers develop and test hypotheses about what works for their particular students and use results to inform real-time adjustments.