For anyone that the Super + Left or Right shortcut didn't work for on Zorin Lite, following AZorin's response in the link below solved it for me:
Steps 1-3 disables the "start menu" shortcut, which interfered with any super-key shortcuts .
I personally kept the menu-shortcut and changed it to Super + Spacebar.
Aravisian also includes a useful link for other shortcuts at the bottom of his first response.