AMSCO is dedicated to providing high quality, inexpensive textbooks and support materials to the educational community. Our course texts, review, and test prep books reflect national and state standards for curriculum and assessment. We offer a growing list of books aligned to both the intent and the specifics of the Common Core State Standards. In addition to answer keys, many of our titles are accompanied by Teachers' Manuals, which provide lesson plans and suggestions for instruction. AMSCO's reputation has always been that of a provider of content rich, competitively priced, classroom useable materials.