First of all I have opened the Gmail app and I have logged in, then I followed the following steps:

I’ve entered the “Settings” snail that sits on top.

Then I went into “Show all the settings”

He searched the tag section alongside “General”

I went down until I reached the section that says “Create a label”, which will let me create them.

I have made a label for every teacher I have and another for my classmates.