ClassX Video Lessons Grade Grade 9

Category: Grade 9

The Greek myth of Demeter’s revenge – Iseult Gillespie

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What is earwax — and should you get rid of it? – Henry C. Ou

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The rise and fall of the Maya Empire’s most powerful city – Geoffrey E. Braswell

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How do gas masks actually work? – George Zaidan

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Why don’t “tough” and “dough” rhyme? – Arika Okrent

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How does an air conditioner actually work? – Anna Rothschild

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How did ancient civilizations make ice cream? – Vivian Jiang

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The secret behind how Chinese characters work – Gina Marie Elia

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Why does hitting your funny bone feel so horrible? – Cella Wright

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How do bulletproof vests work? – Max G. Levy

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