Right before Sikowitz smashes himself through the window, Jade/Betsy-Sue Goldenheart can be seen sitting along the side of the coffee table with her back facing the camera, but in the next shot, after Sikowitz smashes himself through the window, she is not sitting there.
In reality, teachers are not allowed to invite students to their houses.
After Andre broke character, his grandmother told him he's in trouble and dragged him to her house. Later on, he is seen in Tori's house with his friends and her parents. Response: The group likely texted him and invited him over.
Sikowitz tries to teach the whole class about method acting, but only invites the group to the sleepover.
Sikowitz's challenge was for the students to stay "in character" until Saturday morning. In the morning, Beck broke character then Tori said she won because she was the last one to break character. But the challenge was only to stay in character until morning, so really both Beck and Tori won.
When Father Vega opens the front door for Cat and Jason, he does not turn the door handle, he only pulls it to open the front door.
Jade/Betsy-Sue Goldenheart does break character when she gives the warning to Beck/Malcolm Winchester Fizzenworth after Tori/Officer P'Desko feeds him raisin bran but Sikowitz does not notice.