Teachers may find the following resources helpful as they utilize Office 365 with their students.
This is a half-sheet slip (2 slips per page) that summarizes how students can log on to Office 365. This may be appropriate to hand out at the beginning of the year to remind students that they have Office 365 accounts and let them know how to access them (students will need to write in their usernames and passwords, or you can do that for them).
This is a brief (2:14) video that shows students how to log in and gives them a brief tour of Office 365. This may be appropriate to show the first time you introduce Office 365 to your students.