나의 두 번째 교과서

The amount of money in circulation, or the “money supply,” keeps increasing. In our country, the money supply grows by about 7% annually, meaning it roughly doubles every ten years. Financial planning is essential in a society where the amount of money keeps growing. If your wealth doesn’t grow by …

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Beginner investors often ask the same questions: “Which stock should I buy?” “Should I buy or sell real estate now?” CEO Lee Jin-woo says these questions should be asked “the other way around.” With stocks, the question “When should I buy or sell?” matters more than choosing which stock. With real …

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People often say that “interest rates” and “exchange rates” are the starting point of financial literacy. But many people give up after hearing difficult explanations. To help overcome the first obstacle to financial literacy, CEO Lee Jin-woo has prepared explanations anyone can understand …

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How did apartments in our country become an investment vehicle? The roots of Seoul becoming an “apartment republic” go back to 1960. The government spearheaded the construction of large apartment complexes to house the population concentrated in the metropolitan area. This led to the formation of a …

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The common perception is that debt is “dangerous.” However, the modern economy runs on debt, with money “circulating.” Banks make profits through loans. If debt were only dangerous, this would be impossible. CEO Jung In-woo says that debt can be either “poison” or “beneficial,” depending on how …

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When we watch the news, it always feels like we’re in an “economic crisis.” But CEO Lee Jin-woo says there is a specific “real economic crisis.” It occurs precisely when banks lose people’s trust. When people who have deposited their money in banks rush to withdraw it—a phenomenon known as a “bank …

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How do you get rich? The fastest way is to be born in a “rich country.” American economist Branko Milanovic, who studies income distribution around the world, argued that “the country where I was born determines more than 50% of my lifetime earnings.” So what distinguishes wealthy countries from …

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The essence of economics is “choice.” In the process of earning, consuming, and investing, we choose one thing and give up another. Together, these choices shape our lives. So how do we make good “choices”? CEO Jung In-woo first recommends understanding the essence of the “game.” For example, the …

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Why do students struggle with Korean? Professor Nam Mi-ae says studying Korean means reading all kinds of texts in Korean, including history, philosophy, and science. In other words, we learn about the world and understand people through reading. Even though people know how important reading is …

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Reading novels is not only entertaining; it also gives us something else: an understanding of people and the world. Novels reflect society’s consciousness of its time and the nature of humanity. Authors also offer various solutions to our concerns. In Part 3, we explore the distinctive features of …

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Why do we still read classical poems written hundreds of years ago? Because some human emotions never change, no matter how much time passes. The sadness, love, and longing people felt in the past are the same feelings we experience today. The sorrow and anguish expressed over hundreds of years can …

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We know fairy tales as books for “children.” But adults can enjoy them, too. Though written in simple language, fairy tales deal with profound themes that adults can relate to. Their warm, pure stories also comfort the “child” within us. In Lesson 5, we introduce fairy tales from Korea and abroad …

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We’d all like to be people who “speak well.” But Professor Nam Mina says that to become a “Dalbeon,” we need to “listen well.” That’s because listening is the first step in developing language. Listening can also be a means of survival and healing. Listening well for “information” can help us …

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Professor Naminae, who published a collection of essays several years ago, recommends that adults write essays themselves. When you write down the emotional baggage you’ve accumulated, you’ll eventually find that your soul feels cleansed. Essay writing has many other benefits, too. It helps you …

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The first writing skill you need to acquire for a career is writing a “cover letter.” Professor Nam In-ae, who has reviewed many students’ cover letters, says a cover letter is a kind of “argumentative essay.” It’s a piece of writing that persuades people you’re the right person for the job. If you …

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Many people have written a “reading response,” but fewer are familiar with a “book review.” A book review is a piece of writing that evaluates a book. Unlike a reading response, it should include not only personal impressions but also an analysis and evaluation of the book. Professor Naminae …

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The first and last step in writing is “creating a title.” It begins with a “provisional title” drafted at the start and ends with the “final title” chosen after the article is complete. Titles are necessary not only for books but also for workplace reports, blogs, and social media content. Yet many …

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Why do we study science? To explain all the natural phenomena in the world. In the 17th century, English physicist Isaac Newton summarized the principles governing the motion of everything in the world in three laws. These are also known as the “law of inertia,” the “law of acceleration,” and the …

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We need it in modern society, yet we live without really understanding it: What is “energy”? To understand energy, we have to grapple with the somewhat unfamiliar concepts of “mechanics,” “thermodynamics,” and “entropy.” Part 2 explains the relationship between “work,” “heat,” and “energy,” and …

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Electricity wasn’t “invented”; it was “discovered” in nature. After the ancient Greek philosopher Thales first discovered electricity, it came to be used in its modern form thanks to scientists who spent centuries figuring out that electricity and magnetism are actually one and the same. Modern …

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Quantum mechanics and the theory of relativity are the foundations of advanced technologies such as semiconductors, LEDs, and GPS. These two pillars of modern physics trace back to the question, “What is light?” Is light a particle or a wave? We witness the competition among the world’s brightest …

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Richard Feynman, considered one of the greatest physicists of the 20th century, left us with the statement, “Everything is made of atoms.” This episode traces humanity’s quest to find the smallest units of matter, from ancient Greece to the present day. The periodic table, which lists the elements …

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The nature of everything in the universe is determined by the “bonds” between atoms. The reason salt breaks apart easily while gold does not also comes down to “chemical bonds.” The fact that metals are malleable and conduct electricity well can also be explained by chemical bonds. In Chapter 6 …

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Batteries, including those in electric cars and smartphones, have become essential to modern life. Batteries convert chemical energy into electrical energy and are an outstanding chemical invention based on oxidation-reduction reactions. From the first battery, the “Voltaic pile,” invented in the …

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The idea that humans descended from monkeys is a typical misconception about evolution. Why don’t the monkeys at the zoo turn into humans over time? And is an oyster more closely related to clams or snails? In the Round of 16, we examine how the principles of evolution, including natural selection …

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