Stop Introducing Science to the Wizarding World
Science is detrimental to magic.
I've read a lot of fanfictions criticizing Hogwarts for not offering muggle subjects, but in my opinion, offering muggle subjects wouldn't really help much. The main subjects taught to kids are science, math, and language.
Witches and wizards could probably benefit from having a class that teaches them new vocabulary and sentence structures, but the amount of essays assigned to the students probably does a well enough job ensuring that the students at least know how to present information by the time they graduate, through sheer trial and error when the teacher returns the essays marked full of red due to grammatical errors, at least. They could offer Latin classes or something similar to help students understand the language they use in spellwork, but that's not really a class regularly offered to children and teenagers in the normal world so it can't really be called a 'muggle' class.
Mathematics is already offered, for those who wants to learn, in arithmancy. It's most likely a required OWL or NEWT for jobs that require a lot of calculations and the little math that is required in normal day to day life are already already taught to muggleborns in their primary classes, and to kids growing up in the magical world by their parents as part of their home schooling.
Science, I believe, is not only unnecessary but detrimental to the magical education process. Magic is something that has a lot to do with belief. Science imposes a lot of rules, laws, and principles that outlines what is possible, impossible, what's supposed to happen in a specific situation, etc. It is rigid. Magic defies the laws of reality. Teaching the students those laws would make them subconsciously believe in them, making them think that even with Magic, it is impossible. More over, they may even try to apply the laws of reality to Magic. I've read a few fanfictions where they applied chemistry to transfiguration. Where they must understand the chemical composition of both the object they are turning and the object they are turning it to. Eleven year olds were able to transfiguration a wooden match to a needle. Wood is an organic substance with carbon and hydrogen atoms while a needle is usually made of steel, which is an alloy of multiple metal atoms. Do you really think children know enough chemistry to be able to manipulate the protons, electrons, and neutrons withing an atom to turn carbon and hydrogen atoms to different metal atoms like iron and nickel? Of course not. But they were all able to do it as a first year, why? Because their teacher said they could and it's the first day of class, so many probably assumed that it's the simplest and easiest thing to do with magic. It's belief that makes it happen. Knowing the actual process that's happening would just overcomplicate things in their mind and make it difficult for them to visualize the bigger picture of what they want to happen. Instead of focusing on the match turning into a needle, they would instead think about the atoms turning into another atom and arranging those atoms so they form the desired shape. That may be somewhat doable with the match to needle transformation, but what about the later classes where they would be asked to change something made with different materials to another object also filled with different materials? Don't even get started with animate to inanimate transfiguration. How would you even explain cells turning into atoms? They don't have the same constituents of protons, electrons, and neutrons like changing between atoms do.
I really don't like that these fanfictions try to make the Wizarding world more like the muggle world. It's a different world with their own abilities. You can't expect them to do things like the muggles would. You can show them what the muggles do, and they can find inspiration to make a Wizarding version of it. Someone has probably already invented a spell that does the same thing a calculator would, a graphing calculator even, with the graph showing in 3D as a hologram. Some of the magical spells we see in the books are more advanced than even the present stage of technological advancement where AIs and robots are becoming more advanced. Especially household spells. They have a spells that makes the dishes wash themselves! A spell that makes a broom clean by itself! Those are imbueing objects with artificial intelligence all with one spell! The objects don't even have to be specially made to do these things, magicals can just buy a regular old broom from a store and wave a wand over it and boom! No more cleaning chores. Magical sensors are also way more advanced than technological sensors. They can detect intent, spells, forgotten thoughts (the remembrall), and likely more.
In conclusion, adding muggle subjects is not only redundant, but would hamper the progress of magical advancement. Similarly, converting muggle technology and following its progression instead of finding a way to make something like it with Magic would make innovating within the Wizarding world hard. Not to mention, while phones and computers are something that doesn't exist in that Wizarding world, the later technological advancements like AI and robots can already be done using spells, which everyone can do, so following the muggle technology progression can't really be sustainable for long anyway.
Besides, magicals have different needs than muggles. While the muggles' current primary focus is electricity and food, magicals power everything with magic, and while food can't be made out of thin air, it can be doubled from existing food. There's probably even magic that causes plants to grow quicker, and if there isn't, magicals don't have the same problem muggles do with space for their food crops. They can expand a space, plant a lot of crops, cast some spells that would provide all the nutrients and water needed for healthy plants, and they can have food right at their backyard. I've always thought magicals are very independent creatures. With the magic and classes taught at Hogwarts, they can conjure or transfigure everything they need, use charms to make their life easier, defend themselves with magic, brew their own medical potions, and grow their own crops with herbology.
What do we learn in school? How to do math we'll likely never use and science laws most don't even care about.
