Another big takeaway from decades of scientific research is that, while we use our eyes to read, the starting point for reading is sound. What a child must do to become a reader is to figure out how the words she hears and knows how to say connect to letters on the page. Writing is a code humans invented to represent speech sounds. Kids have to crack that code to become readers.

The basic assumption that underlies typical reading instruction in many schools is that learning to read is a natural process, much like learning to talk. But decades of scientific research has revealed that reading doesn't come naturally. The human brain isn't wired to read. Kids must be explicitly taught how to connect sounds with letters — phonics.