A plot could involve Harry being asked to teach Muggle Studies because the previous teacher had some very old - fashioned views. Harry, with his modern and friendly approach, decides to completely revamp the curriculum. He could introduce Muggle movies and music into the class, which causes a stir among the more traditional wizarding families. As he does this, he also has to deal with some students who are resistant to change and try to undermine his new teaching methods.
Well, one plot idea could be that Harry discovers a group of young wizards who have a very wrong idea about Muggles. So, he decides to teach Muggle Studies to correct their views. He could start by taking them on a 'field trip' to a Muggle town, but things go wrong when some of the wizarding spells accidentally cause chaos in the Muggle world. Then he has to fix things while also teaching the students an important lesson.
One challenge could be getting the wizard students to take Muggle Studies seriously. Many wizards might think of Muggles as inferior, so Harry would have to work hard to change that perception. He would need to make the subject interesting and relevant to them.
One interesting concept could be how Muggles perceive magic without really knowing it. For example, in some fanfictions, Muggles might have strange dreams about magical events which they dismiss as just odd nightmares. Another concept could be the study of Muggle technology from a wizarding perspective. Wizards might be fascinated by things like cars or computers and try to figure out how they work in their own magical way. And then there are the interactions between Muggle - born wizards and pure - blood wizards in the context of Muggle Studies. Pure - bloods might have all sorts of wrong ideas about Muggles which Muggle - borns have to correct.
Well, one possible plot could be that Harry discovers a new threat that is specifically targeting Muggles. The wizarding world is either unable or unwilling to help, so Harry decides to take matters into his own hands. He uses his magic in secret ways to blend into Muggle society and eliminate the threat one by one. For example, he might use a modified version of the Disillusionment Charm to stay hidden while stalking his targets.
Well, in a 'Harry Potter marries a Muggle' fanfiction, the plot might involve Harry being on the run from some dark wizarding forces who are after him for his fame. He hides among Muggles and meets a girl who helps him without knowing his true identity at first. As they get to know each other, he realizes he can't keep his secret forever. But she accepts him for who he is, wizard and all, and they end up getting married. It could also include elements of Harry teaching her some basic magic for self - defense.
Perhaps Harry is teaching Potions in the fanfiction. Since he had a bit of a rocky start with Potions in his student days, he could be a very understanding teacher. He might encourage students to experiment more, which is different from Snape's strict methods. He could also share stories about how important Potions were in his adventures, like when they made Polyjuice Potion. This would make the class more interesting and inspire students to take Potions more seriously.
Maybe Harry Potter could teach the preschoolers magic tricks in a simple and safe way, like making feathers float. He could also tell them stories about Hogwarts and his adventures, inspiring their imagination.
Maybe there's a plot where a spell in the Harry Potter world goes wrong and somehow transports Edward into Hogwarts during a Muggle Studies class. Harry has to figure out how to send him back while also dealing with the chaos that Edward's presence causes among the students, especially the female ones who are attracted to him.
Well, it could be about Harry Potter secretly loving muggle music and one day he just starts singing it in the Gryffindor common room, much to the shock and amusement of his friends.
A cool plot could be that a wizard decides to study at a Muggle school to understand Muggle culture better. He might struggle with basic Muggle things like using a calculator or writing with a pen instead of a quill. Meanwhile, he could use his magic in very subtle ways to help his Muggle classmates, like making a wilted plant in the classroom come back to life. This would create a lot of humorous and heartwarming situations as he tries to fit in.
One idea could be a Muggle-born wizard who tries to hide their magical abilities in Muggle society while also secretly helping other wizards in need. For example, they could use magic subtly to fix things around their Muggle neighborhood, like making a broken streetlight work again without anyone suspecting it was magic.