Hi Kritav,

Thanks for the feedback! Feedback like this is really useful for us as we continue to improve the Course Mastery system.

The Mission system has been with Khan Academy since 2014, so removing the Mission system was definitely a difficult decision for us. One of the main reasons why the Mission system is being removed is because it is simply not maintainable in the long run. The Mission system is written in an old code base that’s caused slower load times and bugs that just aren’t sustainable.

That being said, we've worked hard to make sure the new Course Mastery system is more efficient and sustainable than the old Mission system. We've also worked to make sure that Course Mastery has all of the same functionality that was available in the Mission system, but with a more structured format.

Here are some of the popular features of the Missions, and their replacements in Course Mastery:

• In Missions, learners can take Mastery Challenges to test out of skills they already know, and to identify which skills they should work on. In Course Mastery, learners can take the Course Challenge, Unit Tests, and Quizzes before completing the previous content. This will increase the learner's mastery level for skills they already know, and recommend practice exercises and videos for missed questions.
• In Missions, learners can use Mastery Challenges to review concepts that have previously been mastered. We've just introduced a new Spiral Review feature for Course Mastery that allows learner's to review concepts they have already mastered in the course.
• In Missions, learners can view their progress through the circular progress indicator and grid of skills. In Course Mastery, learners can view their mastery progress for the course and each individual unit from the main course page. Clicking inside the unit allows the learner to view their mastery level for each individual skill.
• Course Mastery also offers a more structured approach to learning. The videos and exercises are listed in a set order, whereas there was no clear order for the skills in the Mission view. However, the exercises and units in Course Mastery can still be completed in any order like the Mission system.

If you have any additional feedback for how we could improve the Course Mastery system to better fit your needs, please continue to share here!

Thanks for posting! Let me know if you have any additional questions!

well, it seems to me that missions are being removed because of logistical issues.

is there any way that in the future missions can be brought back with a similar user interface and algorithm but written in a more structured  manner with a faster language so basically reconstruct if from the ground up

I know I know, finances and other stuff but we did #teamtrees last year so...?

well, it seems to me that missions are being removed because of logistical issues.

is there any way that in the future missions can be brought back with a similar user interface and algorithm but written in a more structured  manner with a faster language so basically reconstruct if from the ground up

I know I know, finances and other stuff but we did #teamtrees last year so...?

@samuel2000wilson just a reminder to remove ur duplicate comment 😊

I just figured out how to use missions! And I think they are awesome! Except now I am sad that Khan Academy is taking it away.

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