Math achievement is critically important to the changing global economy. In order to be successful, students must develop a strong foundation in mathematics early in their school careers. But the training elementary teachers receive doesn't always prepare them to teach math well, and math anxiety can keep both students and teachers from reaching…

This work summarizes the results of two randomized control trails (RCTs) aimed at evaluating the effectiveness of a professional development program for lower secondary school math teachers. The program, called M@t.abel, was financed by the Ministry of Education in Southern Italy with EU funds. It lasts a full school year and it is based on formal…

One purpose of educational research is to provide information about the likely impact of interventions or treatments on policy-relevant populations of students. Randomized experiments are useful for estimating the causal effects of interventions on the students in schools that participate in the experiments. Unfortunately, the samples of schools…