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04:31 Design, Engineering & Technology How do gas masks actually work? Lesson duration 04:31 576,345 Views
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05:55 Social Studies Picture a perfect society. What does it look like? Lesson duration 05:55 259,237 Views
04:40 How can you change someone's mind? (hint: facts aren't always enough) Lesson duration 04:40 2,194,395 Views
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05:43 Health What causes addiction, and why is it so hard to treat? Lesson duration 05:43 783,974 Views