"Take Control" of keyboard shortcuts with the Ctrl key (for Windows/Chromebooks)!
Here's a PDF and a high-resolution JPEG of a keyboard shortcut poster that will complement your computer lab (or classroom in a 1:1 laptop/computer environment).
If you have Macs as well as Windows/Chromebooks, please check out the "Keyboard Shortcuts Poster (Command ⌘ Key) for Mac Computers" poster—identical, but for the Command (⌘) key on Mac computers:
Please enjoy! You can print at as large a size as you need due to the high resolution. Use a banner printer, a professional printer, or set print to "tile" and assemble yourself.