Duff & Graham 
Place Value, Grades K – 6 [PDF ebook] 
Practice Pages and Easy-to-Play Learning Games for Base-Ten Number Concepts

Make math matter to students in grades K-6 using Place Value! This 64-page book helps students, especially struggling learners, understand the base-ten system. This book contains reproducible base-ten models, practice pages, assessments, games, and Web sites. It covers topics such as naming and writing numerals, counting, using expanded notation, ordering and comparing numbers, and applying knowledge about numbers. The book supports NCTM standards.