The purpose of this task is to support students in developing an understanding of a place value strategy for adding numbers. By using a representation to visualize the abstract notation, students will make sense of the strategy, adding...

On this interactive website students practice various math skills using a real life scenario on a fishing boat. Those skills include counting forwards by tens, reading three-digit numbers, and producing a three-digit number using base...

Explains and illustrates the thinking behind the concept of place value.