Raqioth A'tlasyphoros Triabyssios

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2. News and Updates from Khan Academy
3. Content update: New content in High School Chemistry!

Yayyyy

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2. General Khan Academy Questions
3. Badge Tiers

That's nice! :]

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2. General Khan Academy Questions
3. Mastery of classes?

You have to do Course Challenges, Unity Tests or Mastery Challenges

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2. General Khan Academy Questions
3. Badge Tiers

Hey! Challenge patches are specific to the course content, they do not follow the normal level from most common to rarest, which are: Meteor, Moon, Earth, Sun and Black Hole respectively.

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2. Study Group
3. Learning Routes

Now you have to Master Arithmetic and then Basic Geometry

1. Community
2. News and Updates from Khan Academy
3. Content update: Brand new high school physics and biology courses are here!

Thank you guys very much