# Teacher Tool of the Month: Place Value with Decimals

Place Value with Decimals The interactive white board Teacher Tool for this lesson can be found on our website under “Resources” or by visiting Teacher Tools. With this tool, students compose decimal numbers using place value dials to understand the relationships between powers of ten. This tool empowers students to adjust a different dial for each place value: ones, tenths, hundredths, and thousandths. Similar to how the hour hand and minute hand on a clock move in concert, every dial is linked to the movement of the others. Sample Lesson Objective: Students compose numbers using multiple dials to develop an understanding of the relationship between the place values of whole numbers and decimal numbers. Background: Students should have an understanding of place value with whole numbers before beginning this lesson. For example, they should understand that the number 250 is equivalent to 25 tens. Because the objective is to understand decimal place value relationships (i.,e., 2.5 is equivalent to 25 tenths), our Curriculum Director, Dr. Tim Hudson created a short video explaining the importance of place value and how this manipulative develops undersatnding. Click here to view his video. Understanding Place Value Lesson: 1. Bring up the DreamBox interactive white board lesson.