Cohorts FAQ
From MoodleDocs
I created a cohort and now I can't find it again!
If you create a cohort from Settings>Site administration>Users>Accounts>Cohorts and then assign it to a category, you will not see it listed on that screen. To view or edit it, you need to go to the category page and click the Cohorts link in the Settings block there:
How can teachers enrol cohorts?
By default, regular teachers are not able to enrol cohorts. However, you can give them the Cohort enroller role to allow them to do this.