Yes, you can do so if you are the meeting organiser, or made the presenter by the organiser.
However, students (attendees) are free to turn on their video and audio on their own accordPlease refer to this FAQ before recording the meeting.
Yes! Record your meetings in Teams to capture audio, video, and screen sharing activity.. Please refer to this FAQ before recording.
For channel meetings, everyone in the team (including students) can start or stop the recording. Change the meeting options that only you can present if you do not want others to record.
For open other meetings, if you had done Step 3, only the organiser and presenters are allowed to start or stop the recording. It'd be good to let the students know in advance that their participation is being recorded.
Recorded meetings are saved in Microsoft Stream (a video-sharing service part of Office 365) of the person who started the recording. Only that person can delete or download the mp4 file from the Stream account.
See See: Record a Meeting
You can change click on your profile photo and change the status to "Do Not Disturb" during a presentation to silent any Teams notifications.
However, some users may find it not working as intended. You can change the profile Settings > Notifications and change to "Only show in feed" but remember to revert after the meeting.