What is the Science of Reading?

  …a vast, interdisciplinary body of scientifically-based research about reading

and issues related to reading and writing. This research has been conducted

over the last five decades across the world, and it is derived from thousands

of studies conducted in multiple languages. The science of reading has

culminated in a preponderance of evidence to inform how proficient reading

and writing develop; why some have difficulty; and how we can most

effectively assess and teach and, therefore, improve student outcomes

through prevention and intervention of reading difficulties.  

(The Science of Reading:  The Defining Guide(TRL 2022)