From Emily Hanford at The New York Times:
How do we know that a big part of the problem is how children are being taught? Because reading researchers have done studies in classrooms and clinics, and they’ve shown over and over that virtually all kids can learn to read — if they’re taught with approaches that use what scientists have discovered about how the brain does the work of reading. But many teachers don’t know this science. What have scientists figured out? First of all, while learning to talk is a natural process that occurs when children are surrounded by spoken language, learning to read is not. To become readers, kids need to learn how the words they know how to say connect to print on the page. They need explicit, systematic phonics instruction. There are hundreds of studies that back this up.