Aside from the academics that we learn in school that helps us with our real life, we learn so many things about relationships, communication, and ourselves that help us in our real like.
In school we have to work together on different tasks. This helps us build relationships, communicated in a positive way, and team work. All of these are helpful in the real world. Being able to work with others and communicate your ideas in an assertive way are essential to any job in the real world.
In school, we also learn about self regulation and keeping ourselves on an even keel. Many kids struggle with this and if the skill isn't learned, then they will grow up to be adults that can't self regulated when they are having strong emotions. This is a skill many children attending school are lacking. Many schools are starting to address this and teach these skills in school.
School also helps us with communicating our wants and needs. We learn to do this appropriately from a young age due to being in school with many kids in our classroom. We have to learn to be assertive and know the respectful way to communicate with others. I think this is another important skill that school teaches us for the real world.
Academics play an important role in being ready to be in the real world, however, many times, people drive academics and forget about all the social and emotional skills that students need to learn at school to be respectful and successful adults.
The things school actually teaches you - literature, arts, history, mathematics,science, etc - are proposed to give you a sufficiently wide base from which you can openly pick the course you need to go throughout everyday life. This implies as you practice, a significant number of these subjects may move toward becoming "insignificant" to you, yet having this expansive base of information gives you a superior establishment throughout everyday life. Information from inconsequential fields can frequently give helpful knowledge to your own specific field.
That being stated, the most helpful thing which you gain from school isn't the stuff that is in the addresses or in the reading material. The most vital things you gain from school are in the strategies for learning and cooperating with other people. School instructs how to put forth a concentrated effort, how to study and get new material, how to tune in to other individuals, how to figure out which information is helpful to realize, how to observe truth from fiction, how to work inside a lot of tenets, how to deal with your time, how to manage calendars and due dates, how to function admirably with other individuals, how to manage troublesome individuals, etc. To put it plainly, the most critical exercise school trains you is the means by which to manage this present reality.
Most of the things we learn in school are very applicable in real life. One general thing that school does for everyone of us regardless of our field of study is that it builds up our mind and teaches us how to reason and analyse situation. School also teaches us how to communicate and relate with others. So what we learn in school is very applicable in real life from both the general view point and the professional view point
There is such a variety of jobs, simple or very sophisticated, future and unpredictable, that we can not select what knowledge to teach at 5, 10 or 15 years to be really useful at 30 or 55 years or decades later ! So, let's sweep wide: you would have been so critical if you did not teach anything a priori "useless", and that which is useful, TO ALL, right away, is not it?
In fact, knowing the capitals of all countries is useless ... except for a future diplomat, businessman, employee of the tourism industry, etc. but who knows what a 15-year-old student will become later? The derivatives are useless to the greatest number, but it is hoped that a part will become an engineer and teaching the derivatives, it is also love, or dislike, these mathematical subtleties to the students and thus detect the potential future engineers we need, to raise them one level instead of waiting .. what: that they say that they want to follow a scientific path without ever having touched something that could have been useless? Same on Mrs. Bovary, the Neanderthal Man, the German, the subjunctive, and so on.
It's like learning vocabulary: out of 20,000 words in the dictionary (maybe 200,000 in the encyclopedia), we use only 2000 fluently. But all of them never use the same. Or like the brain: out of 100 trillion neurons, yes, we only use 10% ... but not always the same, so we do not have unnecessary neurons. I'm not going to trepannate my children to lighten their heads;), you never know, they can serve one day, but of which, will know.
In short, we teach the largest field of culture and techniques, so we know that "it exists, even if I did not understand, and if necessary, I would find (dico, google, wikipedia ...), relearn, or ask an expert "someday. Or better, create a membership, "I like, I want to learn more, to do my job", etc.
A young man with studies of any part of the world knows, or they have taught him, certain notions of algebra, trigonometry, and geometry. Although not them to be used in your life. The fact that teaches mathematics is not based in any scientific reasoning or empirical evidence, but entrenched beliefs, tradition and other interests that are not good for the student. And the same goes for many other subjects of the curriculum.
But the reality of life is different, learn from the experience. Learning is the result of doing things and think about them
Apart from being able to read and write and some basic knowledge I guess this is it. You would learn more through self-study. Of course you would have to learn how to do this first.