Bookmark Folders

When I am lesson planning, I need to have the same dozen tabs or so open every time. Instead of opening these tabs one at a time, however, they can be opened all at once.

To bookmark a website, you can

Click the ☆ symbol in the URL bar
Use the keyboard shortcut "Control D"
Click on the ⋮ menu > Bookmarks > Bookmark this tab

To bookmark a set of websites, you can

Open all of the websites that you want to bookmark
Click on the ⋮ menu > Bookmarks > Bookmark all tabs (or use the keyboard shortcut "Control Shift D"