The Reading-CODE initiative in Tanzania aims to improve literacy skills and create lifelong readers. It provides culturally relevant books, supports libraries, and trains teachers in instructional methods. Research was conducted comparing students in schools participating in the Reading-Tanzania project versus control schools. Students in project schools significantly outperformed control students on reading comprehension, fluency, and writing assessments at both 2nd and 4th grade levels. The largest differences were seen in comprehension and fluency for 2nd graders, and comprehension and writing for 4th graders, which are areas of focus in the Reading-Tanzania training. The control schools faced greater challenges in teaching students with weaker basic skills.