|Geek of the week: mastery|
|Finish 5 mastery challenges in a week|
|Energy point(s) awarded||0|
Geek of the week: mastery is a Moon badge. To earn it, the user has to complete 5 mastery challenges in a week. There is a chance that user will not acquire the badge because the 5 finished mastery challenges are not in the same Math mission. This badge can be found here on Khan Academy.