When you open Google Classroom, the first thing you'll need to do is create a class. Click the Plus icon in the top-right corner, then select Create class.

This will bring up a dialog box asking if you're planning on using Google Classroom at a school with students. Google Classroom requires schools to use G Suite for Education if their teachers plan to use it in their actual classrooms. This provides teachers and students with more privacy and security measures. If you're using Google Classroom for your own personal use, you won't need to worry about this.

You'll then need to enter the name of your class. There's also the option to enter a Section, Subject, and Room if you're using Google Classroom in a school and want to include this information. When you're done, click Create.

Navigating Google Classroom
Once you've created a class, you'll be taken to that class' page.
Menu
In the Menu, you can access other classes, your calendar, to-do lists, and more.

Stream Tab
The Stream tab is kind of like your class' homepage. You'll find all of your posts here, as well as upcoming work.

Classwork Tab
The Classwork tab is where you'll create, assign, and grade all of the work for your class.

People Tab
In the People tab, you can view and communicate with the students and teachers in your class.

Grades Tab
In the Grades tab, you can see each student's overall grade as well as their grades for individual assignments.
Answers & Comments
Answer:
Creating a class
When you open Google Classroom, the first thing you'll need to do is create a class. Click the Plus icon in the top-right corner, then select Create class.

This will bring up a dialog box asking if you're planning on using Google Classroom at a school with students. Google Classroom requires schools to use G Suite for Education if their teachers plan to use it in their actual classrooms. This provides teachers and students with more privacy and security measures. If you're using Google Classroom for your own personal use, you won't need to worry about this.

You'll then need to enter the name of your class. There's also the option to enter a Section, Subject, and Room if you're using Google Classroom in a school and want to include this information. When you're done, click Create.

Navigating Google Classroom
Once you've created a class, you'll be taken to that class' page.
Menu
In the Menu, you can access other classes, your calendar, to-do lists, and more.

Stream Tab
The Stream tab is kind of like your class' homepage. You'll find all of your posts here, as well as upcoming work.

Classwork Tab
The Classwork tab is where you'll create, assign, and grade all of the work for your class.

People Tab
In the People tab, you can view and communicate with the students and teachers in your class.

Grades Tab
In the Grades tab, you can see each student's overall grade as well as their grades for individual assignments.