A guide to understanding dyslexia in children and youth, with strategies for assessing and teaching reading and spelling. In today's digital world, reading and writing are more important than ever. Students are reading and writing text on smartphones, tablets, and laptops as well as in school for hours every day. Yet many of these students will have dyslexia--between 5% and 20%, depending on the school--and they will struggle to enter this new digital world because they cannot read and write well. This handbook is not a course of instruction. Its goal is to give the teacher a handy reference manual to help students with dyslexia, and other students with severe reading and writing difficulties, to read and write well. At the heart of the handbook is the belief that the teacher is the most important factor in whether or not a student will succeed at school. In this second edition, there are new chapters on the dyslexia-friendly school, dyslexia in adulthood, and the use of technology to assist students with dyslexia. All other chapters have been reviewed, and the appendices have many new features to assist in screening and teaching.