We learn in this episode that Huck has never been to school.
Huck's comment about how he could have drowned in the swimming pool might have something to do with the fact that he cannot swim. He has first mentioned this in episode 2, "Sir Huckleberry Hound".
The two kids that Huck has to bring to school are named Mickey and Icky Vanderblip.
This is the first time we hear Huck sing his trademark song, Oh my Darling, Clementine. He was humming the song in the first episode, "Sheriff Huckleberry", and even heard singing a verse, but instead of Clementine, he said "what's her name" back then.
Huck: (in school) 3 and 3 is 5? 7? 4? 16!
Huck: (while being tied up on the toy train's tracks) You know, I think I'm on the right track now!
Huck: (while chasing the kids) They don't call me bloodhound for nothing.
Huck: (reading the kids' report) Absent 5 times this week. And it's only Tuesday!
Huck: Truant officer Huckleberry always gets his man... kid.