Why do I have to use a number 2 pencil?
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Best of Web
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Why do exams always tell you to use a number 2 pencil? What happens if you don’t? SciShow explains.
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TED-Ed Best of Web are exceptional, user-created lessons that are carefully selected by volunteer teachers and TED-Ed staff.
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- Video created by SciShow
- Lesson Plan created by Cynthia Silva
