Microsoft Teams training video – https://support.office.com/en-us/article/microsoft-teams-videotraining-4f108e54-240b-4351-8084-b1089f0d21d7
End-User Training – https://docs.microsoft.com/en-us/microsoftteams/enduser-training
Related Pages –
How can MS Teams help you with your teaching?
Chat with classroom, students or team members on MS Teams
Schedule and manage online class/meeting