I think there should be challenge patches for the subject grammar. Like one when you finish "Part of Speech: Nouns," "Punctuation: the comma and the apostrophe," and so forth. Please take my advice...

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2. Feature Requests and General Site Feedback
3. Suggestions

Because now Khan Academy has more skills you can master, (especially in MATH), it would be awesome if you guys could add more mastery badges to Khan Academy. Da Vinci is the highest one so far, if ...

1. Közösség
2. Feature Requests and General Site Feedback
3. Suggestions