This book includes vocabulary words from the new fourth grade Massachusetts curriculum standards. In this booklet, students will have the opportunity to define key vocabulary terms and then complete a practice example or visual to support their definitions. There are a total of 20 key vocabulary words and then practice computation problems at the end for additional practice with facts. I use this book to prepare my students for the MCAS state test, but you can use it for everyday math support. This book would also be beneficial to third and fifth grade.