Elizabeth Halsey is a lazy and immoral teacher at John Adams Middle School in
Chicago. She curses at her students, drinks heavily, smokes marijuana, and lets her students watch movies so she can sleep through class. She plans to quit teaching and marry her wealthy fiancé Mark, but he dumps her when his mother shows him that Elizabeth is only after his money, so she resumes her job. Elizabeth tries to win over wealthy substitute teacher Scott Delacorte, rejecting advances from gym teacher Russell Gettis. Her dedicated and enthusiastic colleague Amy Squirrel also pursues Scott. Discovering that Scott's ex-girlfriend had large breasts, Elizabeth plans to get breast implants. To afford the $9,300 procedure, she participates in the school's 7th-grade car wash wearing provocative clothing and manipulates parents into giving her money for school supplies and tutoring. Amy informs the principal about Elizabeth's
embezzlement, but he dismisses the claims when no evidence is provided. Learning that the teacher of the class with the highest state test scores will receive a $5,700 bonus, Elizabeth forces the class to intensely study
To Kill a Mockingbird for the test. However, the students score low on the practice quizzes, frustrating her. Scott admits that he is attracted to Amy and only likes Elizabeth as a friend. As Amy and Scott start dating, Elizabeth befriends Russell. To steal the state test answers, Elizabeth impersonates a journalist and seduces Carl Halabi, a state professor in charge of creating and distributing the exams. She convinces Carl to go into his office to have sex, then drugs him and steals the answers. A month later, Elizabeth wins the bonus and books her breast enlargement. Learning that Amy and Scott are chaperoning a field trip, Elizabeth smears an apple with
poison ivy and leaves it for Amy, causing her to get blisters on her face. Substituting for Amy on the trip, Elizabeth seduces Scott. They dry hump, and Elizabeth leaves Amy a message through Scott's phone, recording the action. However, Scott's ever-changing ideals disappoint Elizabeth, and she loses interest in him. Back at the school, Amy tricks the janitor into unlocking Elizabeth's desk drawer and finds clues suggesting that Elizabeth cheated on the state exam. Amy informs the principal and gets Carl to testify against her. However, Elizabeth blackmails Carl to say she is innocent. Learning that Amy switched desks with her, Elizabeth states that teachers in the school use drugs. When the police bring a sniffer dog to search, they find Elizabeth's liquor bottles, marijuana, and OxyContin pills in Amy's classroom, in Elizabeth's desk, leading to Amy getting arrested and transferred to another school. Scott asks Elizabeth to start over, but she rejects him in favor of Russell, having learned that they have a lot in common. When the new school year starts, Elizabeth has reformed. She is kinder to her co-workers, has started a relationship with Russell, and did not get her breasts enlarged because she feels that it is unnecessary. Elizabeth also has a new position as the guidance counselor. == Cast ==