How to raise rank? What activities give you points?

Question

Rank up?

Answer 1

_ complete courses
_ unlock badges
_ complete challenges
_ daily login

Answer 2

How do challenges work?

Answer 3

there is a lightning icon
click on it

you then choose your language
also called weapons

you either choose a random opponent
or select one

users can also challenge you
in which case you can decline
or accept

Answer 4

One last question. there is bronze,silver,gold and platnium right? Are there any more levels?