Does anyone know where this comic strip is from?

Francis is complaining about Nate's chaotic antics and openly questioning why they are even friends.
Randy suddenly walks up and shoves Francis down into the snow because Francis wouldn't let him cheat by copying his test answers.
Nate immediately pops out of nowhere and rescues Francis by pelting Randy in the head with a snowball, prompting Francis to reconsider his complaints and be glad they are best friends