The Science of Reading: A Defining Guide (2022) defines the science of reading as
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 of and intervention for reading difficulties.
Tens of thousands of studies inform consensus on how students learn to read; much of this evidence is summarized in The Reading League’s Curriculum Evaluation Guidelines and major research reports. Because many primary studies are behind paywalls, learners can request copies directly from authors.