The Lumos Skills Mastery tedBook – Grade 3 Math, Student Copy is a standards-based mathematics practice workbook published by CreateSpace in 2018. Authored by Lumos Learning, this textbook is designed for education in the subject area of mathematics testing and measurement. The trade paperback format features 148 pages of English language content targeted towards Grade 3 students. With dimensions of 11 inches in length, 8.5 inches in width, and 0.3 inches in height, this book is a valuable resource for students looking to master their math skills.