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Khan Academy
Khan Academy: Salutations and Valedictions
David and Paige, KA's resident grammarians, talk about how to address and sign off on letters using commas!
Sophia Learning
Sophia: Punctuating Dialogue: Lesson 2
This lesson introduces the punctuation and formatting rules for conversations. It is 2 of 2 in the series titled "Punctuating Dialogue."
Science Friday Initiative
Science Friday: Listening in on the Brain to Decode Speech
A study in PLoS Biology details how researchers decoded the brain's electrical activity to reconstruct speech.