You can view the calendar Week or Month or Year. Just tap on the top right to change the view.
You can show or hide ONLY your class temporarily. Here is how you can do it. 

Toggle sub-calendars on or off from view temporarily by clicking on the sub-calendar title bar, or the eye icon at the end of any calendar’s title bar.

• To hide a sub-calendar, click on the sub-calendar name bar. This will hide all events for that sub-calendar.

Temporarily hidden sub-calendars have white lines on their colored name bar, so you can see at a glance which sub-calendars hidden and which are currently shown.

• To show a hidden sub-calendar, click on the sub-calendar name bar again. All events for that sub-calendar will then be displayed once more.