Working With Number Lines

First graders worked together to build number lines.  Students were able to explain their thinking regarding both the size and the order of the numbers.  Later in the week, we learned how to use the number line as a tool for both addition and subtraction problems.  We coded the beginning number, size of the "jump", and the landing number.  

The boys and girls then built a number line chunk of their choice and used it to model an addition or subtraction sentence with a jump of two.  This work can be found on their student blogs!