There are multiple ways you can assign your apps - to ClassLink profiles, groups or users. Select the tab from the top for Profile, Group or Users. Now just click on Add or the trash icon to assign/unassign apps. That's it! Thinking of a particular app or resource? Check out the App Library first! Adding an app from the App Library put it in your Assign Apps list - now you can assign the app to your users!
When an app is assigned, it can no longer be set to Enterprise and users will not be able to add it from the district app library.
The groups you've added play a huge role when deciding to assign apps. Avoid using groups with ALL Students or ALL Teachers. Utilize smaller groups like building groups (ES/MS/HS Students or Teachers) or groups by graduation year (2017Students, 2018 Students etc) to give you the ability to assign grade specific apps.
There are multiple ways you can assign apps, to profiles, groups or users - but now you can assign apps into folders! Users can manage their apps by creating their own folders. This allows admins to create locked folders which users cannot delete, add/remove apps, or rename the folder.