Bad Teacher is a 2011 American comedy film directed by Jake Kasdan and written by the writing team of Lee Eisenberg and Gene Stupnitsky. Starring Cameron Diaz, Justin Timberlake, Lucy Punch, John Michael Higgins and Jason Segel, the film tells the story of a middle school teacher who hates her job, her students, and her co-workers but returns to teaching after her wealthy fiancé breaks up with her.

Bad Teacher was released in the United States on June 24, 2011, by Columbia Pictures. It grossed $216.2 million.

Elizabeth Halsey is a lazy, immoral, manipulative, gold-digging teacher at John Adams Middle School in Chicago who 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, 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. Her dedicated and enthusiastic colleague Amy Squirrel also pursues him while Elizabeth rejects advances from the school's gym teacher, Russell Gettis.

Elizabeth plans to get breast implants and becomes more motivated to do so upon learning Scott's ex-girlfriend had large breasts. However, she cannot afford the $9,300 procedure. Elizabeth attempts to raise money for the surgery through the 7th-grade car wash, wearing provocative clothing and manipulating parents to give her money for more school supplies and tutoring, but her efforts are not enough.

Amy informs the principal about Elizabeth's embezzlement, but he dismisses her claims when no evidence is provided. Scott also admits that he is attracted to Amy and only likes Elizabeth as a friend.

Discovering that the teacher of the class with the highest state test scores will receive a $5,700 bonus, Elizabeth decides to force the class to intensely study To Kill a Mockingbird for the test. However, since it is late in the school year, combined with her unorthodox teaching methods, the students score low on the practise quizzes, further frustrating her. Meanwhile, she befriends Russell, as Amy and Scott start dating.

Elizabeth plans to steal the state test answers by impersonating a journalist and seducing Carl Halabi, a state professor in charge of creating and distributing the exams. She convinces Carl to go into his office to have sex, but drugs him and steals the answer key. A month later Elizabeth wins the bonus, completing her needed funds, and books her breast enlargement.

When Elizabeth learns that Amy and Scott are chaperoning an upcoming field trip, she smears an apple with poison ivy and leaves it for Amy, who ends up with blisters covering her face and cannot go. On the trip, Elizabeth seduces Scott. They dry hump and Elizabeth secretly leaves Amy a message through Scott's phone, recording all the action.

However, Scott's ever-changing ideals disappoint Elizabeth. After her student Garrett is taunted by his classmates for confessing to an unrequited attraction to a superficial girl in the class named Chase, Elizabeth consoles him and helps make him popular, which prompts her to begin reflecting on her own superficial ways.

Back at the school, Amy switches Elizabeth's desk with her own to trick the janitor into unlocking Elizabeth's sealed drawer. The evidence Amy finds leads her to suspect Elizabeth cheated on the state exam. Amy informs the principal and gets Carl to testify against her. However, Elizabeth took embarrassing photos of Carl while he was drugged and uses them to blackmail him to say she is innocent.

Having been informed that her desk was switched, Elizabeth states that teachers in the school use drugs. When the police bring a sniffer dog to search the school, they find Elizabeth's mini liquor bottles, marijuana and OxyContin pills in Amy's classroom, in Elizabeth's desk, leading to Amy getting arrested and transferred to another school by the superintendent. Scott asks Elizabeth to start over, but she rejects him in favor of Russell, having learned they have a lot in common.

When the new school year starts, Elizabeth has reformed. She is kinder to her co-workers, and 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 new guidance counselor.

Bad Teacher was directed by Jake Kasdan based on a screenplay by Lee Eisenberg and Gene Stupnitsky. Columbia Pictures purchased Eisenberg and Stupnitsky's spec script in August 2008.^[3] In May 2009, Kasdan was hired to direct Bad Teacher.^[4] The following December, Cameron Diaz was cast in the film's lead role.^[5] Justin Timberlake was cast opposite Diaz in March 2010, and filming began later in the month.^[6]

The film was shot in Los Angeles, California.^[7][8] John Burroughs Middle School was used as location for the scenes at "John Adams Middle School" in the film.^[9]

In the film, Cameron Diaz wears mostly Christian Louboutin shoes. This is due to a contract between the film's producers and the fashion company to include the shoes.^[10]

On May 23, 2013, CBS announced a TV series based on the film, with CBS Studios and Sony Pictures Television as production partners. The show premiered on April 24, 2014, in the 9:30pm time slot.^[22] Ari Graynor played the Cameron Diaz role,^[23] while Sara Gilbert, Ryan Hansen, David Alan Grier, Kristin Davis and Sara Rodier also appeared. On May 10, 2014, CBS canceled Bad Teacher after airing only three episodes.^[24]