The document discusses place value charts and their uses for teaching place value and multi-digit addition and subtraction. Place value charts organize numbers into hundreds, tens, and ones places and can be used to solve problems that require regrouping. They are particularly useful for larger numbers that may be difficult to represent with base ten blocks. Students may work in small groups on activities like Expando, Basketball Addition, Roll & Build, and Place Value Disk Addition that incorporate the use of place value charts.