Introduction
You can create folders inside your Lessons tab and label them as you wish.

Add a folder to the Lessons tab
To add a folder:

Go to the Lessons folder by clicking on the Lessons tab.
To add a top level folder, click Add Content
To add a folder in an existing folder, click on the existing folder, then click Add Content.
Click Folder
Type a title and subtitle.
To write text that shows on the top of the screen when the folder is opened, click Advanced and type in the text box.
Click Save.