Drive and Docs
The core suite is core for a reason
Drive and Docs. And when I say Docs, of course I also mean Sheets, Slides and Drawings too. And lets not forget Classroom.
Google make lots of really great tools for educators, and you'll find a bunch of stuff in this section that should help you navigate your way through the main parts of GoogleLand.
Just hover over the menu to see your choices.
I keep adding content here, so be sure to drop back in some time and check on the latest.