Math Mammoth Grade 4-A worktext is the student book for the first half of fourth grade. This is the 2020 edition. This book focuses on: * addition, subtraction, patterns, and graphs * multi-step word problems and order of operations * place value and large numbers up to one million * multi-digit multiplication * measuring units, including conversions between them Please note this book is spiral (coil) bound. Some of the main features of the curriculum are: - It is mastery-oriented and organized into chapters by topics. Thus, in each chapter the curriculum concentrates on one theme and its connecting topics (such as place value, multiplication, or geometry). Each grade level typically contains 8-10 chapters. - The curriculum focuses strongly on conceptual understanding. - Visual models and exercises are used a lot. - Mental math and number sense are emphasized. - The curriculum is nearly self-teaching for many children, since the full explanations of concepts are included in the student books. Thus it requires fairly little preparation time from the teacher. - There are free videos that are matched to the curriculum. - The curriculum meets and exceeds the Common Core Standards. For the second half of 4th grade math, use Math Mammoth Grade 4-B worktext (available separately at Lulu). Also available are the answer keys and a book containing cumulative reviews and chapter tests.