| Part 1: Preview |
| Part 2: Interpreting student thinking about the number line |
| Part 3: Locating numbers on the number line |
| Part 4: Properties and conventions of the number line |
| Part 5: Summarizing key ideas about the number line |
| Part 6: Analyzing students’ errors when labeling marked points on the number line |
| Part 7: Wrap up |