Coaches can access the Activity Scheduler Program (using their username/password) to enter their teams’ and the opponents’ Games Scores.
To do this, click on Scores and Standings:

Note: You can’t enter a score and save it before the game’s date.

This is an example of an Activity with a Multi-School event:

You can set Scores and Standings to be shown in Team Sites, Mobile App, and the Activity Scheduler’s public view.
Here’s a preview of your Team’s scores and standings:

Here is an example of what the Public sees when clicking on Scores and Standings from the School Calendar: