I wondering if the old display set up of the subject and skills and mastery would come back because that really helped in learning it was also fun and it allowed you to know what you have mastered and what not in an organized way. The set up also appealed to the eye.
-found an online image of the set up that I'm talking about 
Hi!
As you know, back in June of 2020, Khan Academy’s product team made the decision to deprecate Missions and, because the World of Math Course was directly tied to that feature, it was deprecated as well.
All of this was done because Khan Academy was being moved to a new code base that would allow us to deliver a far better experience for all users, and sadly the old code base Missions was based on was not compatible with that change.
Additionally, when MIssions were first introduced, our core focus was Math. Since then, we have achieved one of our greatest objectives: delivering world-class education across multiple domains including Science, History, Computing/Engineering, the Arts, and Humanities.
That said, please know that I've passed your feedback along to the team!
Hi agrigory0023,
I have some great news to share with you!
Based on feedback that you and other learners shared with our team, Khan Academy has recently redesigned the Course and Unit Mastery pages and introduced an overview of the skills in a single course so you can tell in a glimpse what skills you’ve mastered and those that still need to be completed!
To know more about this change, please take a look at the article Update: New mastery progress visualization on Course and Unit pages.
Most importantly, we want to thank you for taking the time to share your feedback to help make Khan Academy a better learning resource for everyone. We take all feedback to heart and appreciate you sharing your ideas with us.
Thank you so much for helping us improve Khan Academy!
Kind regards,
sharhsiz qoldirish uchu Xizmatga kiring