Continuity mistake: When Jack is in his new classroom for the first time, he sits at a metal desk. He falls with the desk when he tries to reach his book bag, which is sitting next to a broken wooden desk. Next, he sits in the same - miraculously whole - wooden desk, then proceeds to break it to smithereens.

Jack (1996)
Directed by: Francis Ford Coppola
Starring: Robin Williams, Diane Lane, Jennifer Lopez, Bill Cosby, Brian Kerwin
Suggested correction: Watched several times, he moves to the desk to the left of him that doesn't have a chair attached.
Continuity mistake: When Jack is playing basketball with his friends, he has on a pink shirt. But afterward, when he is lying to the kids' mother about being a principal, he is wearing a red shirt. He is not in shadow.
Other mistake: Jack's parents were at a Halloween party when his mother went into labor. Later in the movie when he's asked by his teacher he says his birthday is September 12th.
Suggested correction: The movie doesn't specifically say this is a Halloween party. This may simply be a costume party which can and do happen multiple times a year.
As you stated, it doesn't say it's a Halloween party. In fact, there's signs in the room that say "Beaux-Arts Ball."
Principal McGee: I'm Mr. McGee. I've heard so much about you, Jack.
Jack: Hi, Mr. Magoo.
Principal McGee: McGee.
Jack: McGee.
Principal McGee: Yes.
Jack: Magoo.
Brian: You know I was just thinking about the first time you ever rode a bike. Remember that?
Jack: Oh yeah.
Brian: You were so determined to ride. You kept wiping out and nearly took out a couple of the neighbors. It took a couple days until you finally got it, and look at you now! I mean, you're riding like a pro.
Jack: Hey guys, I brought a friend, okay? This is Mr. Woodruff.
Eddie: Are you ten, too?
Lawrence Woodruff: Uh, well if you ask my wife. No I'm afraid I'm just a regular, garden-variety old fart.




