What cognitive processes and skills do children draw on to make meaning from text? How are these capacities consolidated over the course of development? What puts some learners at risk for comprehension difficulties? This authoritative volume presents state-of-the-science research on the behavioral and biological components of successful reading comprehension. Uniquely integrative, the book covers everything from decoding, fluency, and vocabulary knowledge to embodiment theory, eye movements, gene-environment interactions, and neurobiology. The contributors are prominent investigators who describe their methods and findings in depth and identify important implications for the classroom.