Marzano Research Laboratory (MRL) is a joint venture between Solution Tree and Dr. Robert J. Marzano. In service to educators, the company synthesizes Dr. Marzano's scope of educational research, world-renowned for its breadth and depth, into accessible components teachers and principals can use for concrete gains in student learning. Continuous action research ensures MRL strategies are always at the forefront of best practice. MRL consistently analyzes what works in schools and classrooms and always presents research that reflects the current knowledge base of best practice for enhancing student achievement.