knowledge matrix on Instagram: "This reel plays off a viral classroom moment where a student jokingly “upgrades” a disastrous exam score into a passing one using nothing but an eraser, with a caption nudging viewers to try the same hack. The clip blew up because it hits a nerve every student understands—the panic of bad grades and the fantasy of instant fixes. Beyond the laughs, it sparks relatable conversations about exam stress, showing how humor around academic struggles often goes viral by t

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