who played mr dewey on saved by the bell
Patrick Thomas O'Brien Patrick Thomas O'Brien (born January 26, 1951) is an American actor. He is perhaps best known for playing the role of Mr. Dewey, the math teacher from Saved by the Bell.
List of Saved by the Bell characters Nicki Kapowski (portrayed by Laura Mooney) is Kelly’s tomboyish little sister who develops a crush on Zack. She becomes convinced that Zack feels the same way after he mixes up her phone call with Kelly's (while running the "Teen Line"). Although she is only thirteen and in the seventh grade, she nonetheless shows up at Bayside High to visit Zack, sporting a more feminine look and demanding a kiss. After trying various ploys to turn her off (including dressing up like a geek and trying to gross her out with a pet spider), Zack finally has to tell her the truth: he isn’t interested in her; he is in love with Kelly. More angry than hurt, she insults Zack for trying to scare her away instead of having the courage to tell a thirteen-year-old girl how he really feels.