In the updated Grade 4 lessons on capacity, students join a friendly home robot as he helps a family with everyday activities. Through a variety of real-life tasks, the robot’s questions lead students to explore how different containers hold liquid and how to measure those amounts accurately. This new material also lays the foundation for understanding volume, while giving students hands-on practice with liters (L) and milliliters (mL).

Students begin by identifying the capacity of familiar objects and learning how much liquid common containers can hold. As the robot encounters spoons, cups, and bottles, students help him understand which containers “hold more” or “hold less,” and how to record those measurements using the symbols L and mL.
These foundational tasks help students connect measurement units to everyday life, making the concept of capacity feel real and relevant.

As the storyline progresses, so do the mathematical challenges. 
With the robot taking on more complex tasks, students guide him through conversions between liters and milliliters, and solve problems that require combining or comparing different amounts. This gradual build-up ensures students develop fluency and confidence — not just in recognizing units of measure, but in applying them thoughtfully in a variety of scenarios.

To make capacity meaningful, students interact with everyday measuring tools, like measuring cups and graduated containers. They practice:

For Students: These lessons connect math to everyday experiences, helping learners grasp measurement through practical, relatable examples.

For Teachers: The structured approach, from simple recognition to complex problem-solving, ensures students gain confidence in working with units of capacity and prepares them for more advanced topics in measurement and data.

Try It Out Today!

Jump into the updated Grade 4 capacity lessons and see how this new storyline helps students connect measurement to everyday life. 

If you have any questions or need support, don’t hesitate to reach out to us at support@happynumbers.com — we’re here to help you make math more meaningful and engaging for your students!