Academic success, as defined by high school graduation, can be predicted with reasonable accuracy by knowing someone’s reading skill at the end of 3rd grade. A person who is not at least a modestly skilled reader by that time is unlikely to graduate from high school. (National Research Council, 1998)
Our work needs to move forward with a sense of urgency. We must teach all kids to read early or doom them to an academic life of futility, frustration, and ultimately failure. You can see more quotes like the one above right here.