Lexia LETRS (Language Essentials for Teachers of Reading and Spelling) is a professional learning course for instructors of reading, spelling, and related language skills. It provides educators with in-depth knowledge and tools that they can use with any reading program. LETRS gives teachers this knowledge while addressing each component of reading instruction--phonemic awareness, phones an word study, oral language, vocabulary, reading fluency and automaticity, comprehension, assessment, and writing.