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An interactive challenges mathematicians to add mixed fractions with unlike denominators. Five questions—fill-in-the-blank and multiple-choice—build from one to the next leading the way to an open discussion about denominators and factors. A helpful tool showcases a graduated cylinder and three beakers filled with water that scholars poor from one container to the next.
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CCSS:
Designed
Concepts
Additional Tags
Instructional Ideas
- Bring the interactive to life—have beakers, a graduated cylinder, and water available for learners to pour and examine
 - Assign the link for homework, prepare class members to discuss question five when they return to school the next day
 - Review each problem with the class, encourage participation, and clear up any confusion
 
Classroom Considerations
- Create a free CK-12 account to access the interactive
 - Questions build from one to the next
 - Participants should know how to simplify fractions
 
Pros
- The tool's red dot is easy to move
 - A link offers hints to help solve problems
 - Feedback is given immediately after responses are chosen
 
Cons
- Fractions on the graduated cylinder are spaced closely together, which makes seeing correct amounts difficult
 
