Other mistake: When Roger writes the note after Kel glues his mouth shut, Kenan reads back far more than Roger could realistically have written in the short amount of time he took to write it.
Kenan & Kel (1996)
1 mistake in The April Fools
Starring: Kenan Thompson, Ken Foree, Dan Frischman, Kel Mitchell, Teal Marchande, Vanessa Baden
Kenan: Who loves orange soda?
Kel Kimble: K-K-Kel loves orange soda.
Kenan: Is it true? Is it truuuue?
Kel Kimble: Mmmhhmmm! I do, I do, I do-oooh.
Question: How come Roger won't let Kyra help with her Social Studies project?
Answer: He's simply enjoying doing it himself. Especially since he likely believes he can do it better than she can.