This is a message from Google's Marketing Team:
Hi GfE Admin Community,
For teachers to benefit from shared resources in Google Classroom, like practice sets, video activities and classwork, they must be verified teachers. We’ve clarified the steps to verify teachers. As an administrator, make sure to verify teachers and ensure no students are in the Classroom Teachers Google group.
Soon, Google Workspace for Education administrators will be able to label organizational units or Groups with a ‘Staff access’ setting. All users in the corresponding OU or Group will be able to access shared resources, including practice sets, video activities and classwork.
Kristal D Ayres