Rigorous evidence from around the world has shown that significant improvements in learning can be obtained at comparatively low cost by spending more, focused time ensuring that the bottom half of the class in the early grades does not get left behind. The authors present results from the Teacher Community Assistant Initiative (TCAI) that tests…

Mastering basic numeracy and literacy skills is one of the most fundamental goals of education. However, it is estimated that 250 million primary-school-age children lack basic reading, writing and math skills (UN, 2013). Children living in war and poverty stricken countries are among the least likely to attain those basic goals. The United States…