Hundreds, Tens and Ones with a focus on regrouping of Hundreds to Tens and Tens to Ones. Number expanders are used along with base ten blocks and bundling sticks animating. Non-standard regrouping readying students for adding and subtracting are demonstrated with animating blocks and bundles. 0 tens examples are included. Has 4 lessons with accompanying masters and worksheets. Interactive PowerPoint Think Bubble Math 304.