Easily Confused: Beside Vs Besides

Preposition in comparison to something
beside
The trouble we take now to plant seems small beside the promise of fresh veggies all summer!
Preposition by the side of or next to something or someone
beside
Tasha sits beside Jamal in English class
Preposition other than something or someone
besides
There's no pizza left besides plain cheese.
Preposition in addition to something
besides
The kitchen is very busy! Besides cooking, I have to take orders and keep my work space clean.
Adverb as well
besides
They teach sculpture and many other crafts besides.
Adverb in addition to what has been said
besides
I'm not upset the picnic was canceled. Besides, it's supposed to rain later.