Miss Nelson is Missing

Miss Nelson is Missing is an upcoming 2018 animated mystery comedy film based on the children's book of the same name by Harry Allard. It will be produced by Sony Pictures Animation, Color Force, Sidney Kimmel Entertainment, Heyday Films, The Montecito Picture Company and Harpo Films and distributed by Columbia Pictures.

Plot
Miss Nelson is a grade-school teacher whose students constantly take advantage of her nice nature. After their constant misbehaving and rudeness, and their refusal to learn, Miss Nelson determines something has to be done. But then one day, she does not come to school. The students decide that, without a teacher, they can misbehave all day. However, before they get the chance to make mischief, a substitute, Miss Viola Swamp, shows up. Swamp is a strict disciplinarian and gives the students significantly more school work than Miss Nelson ever did. The contrast between the two teachers is so great that the students actively go looking for Miss Nelson and make unlikely conjectures about what may have happened to her, including some students who go so far as to fill out a missing person report with the local police. After many days of tyranny under Miss Swamp, Miss Nelson returns to class and the children rejoice, now being more respectful of her. At the end of the film, it is revealed that Miss Viola Swamp was Miss Nelson in disguise, and a police detective has called off his search for Miss Nelson and will now look for this enigmatic Miss Swamp.

Sequels
The book spawned two sequels.

Miss Nelson is Back
Miss Nelson announces to her class that she will be having her tonsils removed and will be out for the following week. Her students plan on acting up like never before for that week, until an older student warns them about the notoriously strict substitute Miss Swamp. The students fear the worst the following week, but their mild-mannered principal, Mr. Blandsworth will be acting the substitute teacher. However, he turns out to be extremely boring, and the students plot to get rid of him. Three students are able to create a makeshift Miss Nelson, with a costume and a mask, and manage to fool Mr. Blandsworth into thinking that Miss Nelson has returned early. This Miss Nelson takes the students to the movies, and later to the ice cream parlor. However, they unknowingly walk past Miss Nelson's house, where the real Miss Nelson sees them. She attempts to call the school, but Mr. Blandsworth dismisses her claiming "Miss Nelson is back!" leading her to take action. While the students are slacking off enjoying themselves, who should enter the classroom, but Ms. Viola Swamp. It doesn't take much effort for her to put the class back on track with proper behavior, and catching up on schoolwork. She then sees the Miss Nelson mask, and calls them out on their deception. She puts the mask on, as Mr. Blandsworth enters, and feigns surprise, when he claims she's being impersonated. Mr. Blandsworth brushes it off and exits, and Miss Swamp warns the class never to pull a stunt like this again, and she exits herself. A moment later, the real Miss Nelson cheerfully returns. She asks if the class had fun with Mr. Blandsworth. The students humor her, opting not to talk about Miss Swamp, but they ponder why Miss Nelson didn't see her in the hallway.

Miss Nelson has a Field Day
The Horace P. Smedley football team, the Tornados, is notoriously awful and slacking, much to the dismay of the entire school. Eventually, their coach, Coach Armstrong, goes insane, and requires a sick leave. The janitor, Pop Hanson, worries about an upcoming game on Thanksgiving Day, where the opponents, the Werewolves are intensly tough, and will destroy the Tornados if something isn't done. Some students, while chatting suggest that if Miss Swamp were around, she could get the Tornados to play properly, which both Miss Nelson and Mr. Blandsworth overhear. The next day, Mr. Blandsworth dons a witch costume, and attempts to pass himself off as Miss Swamp to the team, but they aren't fooled, and laugh him off the field. A moment later, the real Miss Swamp approaches the team, and now they're scared. She immediately puts them to work on drills, and takes no back talk from anybody. Soon, the results show, as the Tornados start playing like a real team. Mr. Blandsworth ponders about Miss Swamp and starts to ask Miss Nelson, but sees her busy grading papers and decides against it. Miss Swamp warns the team to never slack off again, as she will be watching. Coach Armstrong returns from his sick leave, and ponders how the team suddenly became so much better, but they opt not to answer. The Tornados go on to clobber the Werewolves in the Thanksgiving Day game, much to the delight of the school. While Mr. Blandsworth takes the team to celebrate, Miss Nelson thanks her sister Barbara for her help with the team.