Use models (such as discrete objects, connecting cubes, and number lines) to represent “part-whole,” “adding to,” “taking away from,” and “comparing to” situations to develop understanding of the meaning of addition and subtraction. 0106.2.10
Links verified on 1/2/2015
- Base 10 - build blocks to create numbers with tens and ones - reinforces tally marks, number line, base ten blocks, and allows hundred blocks for advanced students
- Compare Numbers - short interactive lesson using place value and number blocks
- Help Caillou Build a Train Track - When Callilou asks "Do you want to play with me?", click on the train. Match patterns of track pieces to let the passengers get to the train station.
- National Library of Virtual Manipulatives
- Trading Game - explore regrouping using place value blocks [designed for 3rd grade]