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FEATURED LESSON
The Pigeonhole Principle
Discover how counting objects and categories can prove that a match must happen, even before you know where.
- Logical reasoning
- Mathematical proof
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LEARN IT. UNDERSTAND IT. TEACH IT.
Explore the thinking behind the answers. Clear CamLoc videos for students to revisit, teachers to build on, and curious minds to discover.
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FEATURED LESSON
Discover how counting objects and categories can prove that a match must happen, even before you know where.
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Turn a heads-and-legs puzzle into a clear strategy: make a simple assumption, then account for the difference.
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A small change in how you look at numbers can reveal a much simpler way to add them.
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MORE THAN AN ANSWER
Follow a clear explanation. Notice the choices that make a problem easier to solve.
Apply the idea to a new question, then compare your reasoning with the worked answer.
Use the same key ideas in class and at home. Explain not just what works, but why.