Visual prompts explain how to find the intervals between unmarked lines on a number line and link the skill to measuring, such as telling time and using rulers, beakers, and thermometers.
The number lines start with easier problems and gradually become more complex. Earlier pages help students practice finding the intervals between the unmarked lines. Number lines in later pages are designed for specific measuring objectives, such as intervals commonly seen on a thermometer or beaker (5’s, 10’s,