Write Decimals in Expanded Form. This LearnZillion video explains how to read and write numbers to the thousandths place in expanded notation using base ten blocks.
Free Apps
Math Slide
Multiplayer game reinforcing place value by matching an answer to an equation or model.
Pieces Basic
Students use place value blocks to build numbers.
Websites
Place Value Hockey. Place Value Hockey by ABCya.com allows players to practice basic place value skills.
Books
The History of Zero: Exploring Our Place Value Number System by Tika Downey. This book explains the meaning of the place value system.