Hands-On Math: The Double Number Line Course

Build Deep Understanding of Ratios, Rates & Proportions

Are your students struggling to make sense of ratios, proportions, or unit rates? Do they rely on memorized tricks instead of truly understanding the relationships? The key is turning the abstract into something concrete!

The double number line provides a powerful visual model that helps students see proportional relationships, scale factors, and rate reasoning with clarity. By aligning two quantities one below the other, students can visualize how values grow or shrink together, making connections that support deep understanding. In this short, focused course, you’ll learn how to use double number lines to build a strong conceptual foundation for ratios and proportional reasoning, setting students up for success in algebra and beyond.

Objectives

• Explore how double number lines model ratios, rates, and proportional relationships.
• Use double number lines to solve real-world problems.
• Support students in visualizing relationships and explaining their reasoning with double number lines.

Target Audience:

• Math Teachers and Coaches

Format:

• Self-paced eLearning course with interactive knowledge checks and real-world scenarios.
• The estimated time to take the course is 10 minutes.
• Downloadable Lesson plans to support student reasoning using a double (or triple) number line geared to middle school students, and can be adjusted to meet the needs of your students.
• A completion certificate is available after completing the course.