Navigate to the Apprentices tab and select the apprentice you would like to add a cohort for.
Click the pencil icon to edit.
You'll see a section to add a cohort name. Add the name of which Cohort the apprentice is a part of.
Click Save, to save your changes.
The Cohort name will now be displayed at the top, after their active dates.
Navigate back to the Apprentices tab, and filter by Cohort.
Now you have a quick and easy way to select apprentices by cohorts!