Every year, I walk into my classroom and warn my students that they are surrounded by a deadly chemical. I tell them it can cause asphyxiation, dangerously dilute your blood, and it is abundant in the environment. I mention that it is linked to corrosion, that it has industrial applications, and that it contributes to thousands of deaths each year. I speak slowly, seriously, with the weight of a trusted teacher. Some students start to look genuinely concerned. Others pull out their phones to search for this terrifying substance. I tell them they are exposed to it daily, that it is in the air, in their homes, in the food and drinks they consume. I let that sink in. Then I ask a simple question: Should this chemical be restricted? A surprising number of hands shoot up. Some students are ready to ban it outright. Others are hesitant, waiting to see how their classmates react before deciding. There is a ripple of uncertainty across the room. Then I turn to the board and write the chemical formula: H₂O. The silence lasts only a second or two. Then it clicks. The groans, the laughter, the accusations that I tricked them—it all comes out at once. And I admit it: I did trick them. But every claim I made was based on something true. Water can kill people. Water is used in industry. Water causes corrosion. The problem was never that my facts were false. The problem was that my facts were incomplete. That distinction is the heart of the lesson I teach, and it is the lesson I will carry from my Palm Beach County classroom to the National News Literacy Conference in Salt Lake City this October.
Today’s teenagers are growing up in an attention economy. Social media platforms, influencers, advertisers, and even news organizations are all competing for the same scarce resource: eyeballs, clicks, shares, and likes. In that environment, the loudest, most outrageous, and most emotionally charged posts rise to the top. Accuracy becomes secondary to engagement. The content that gets the most reaction is the content that gets the most distribution, regardless of whether it is true, false, or something in between. This is the world my students navigate every day. They are not naive. They are not lazy. They are simply swimming in an ocean of information that has been engineered to capture their attention and keep them scrolling. And the people producing that information know exactly what they are doing. They know that fear makes us click. They know that outrage makes us share. They know that a scientific-sounding phrase can make a falsehood feel official, and a familiar face can make a lie feel trustworthy. The dihydrogen monoxide trick works because it mimics the tactics used by misinformation creators everywhere. It uses a real chemical name, technically true statements, a serious tone, and a trusted messenger. It feels researched. It feels official. It feels like something you should take seriously. My students are smart, but they are also human. They fall for it. And that is exactly the point. Misinformation does not work only on ignorant people. It exploits emotion, trust, peer pressure, and our instinct to make quick judgments. It works on all of us. The only defense is to slow down, question what we see, and understand how our own minds can be led astray.
Let me walk you through what actually happens in the classroom, because the details matter. I begin by describing dihydrogen monoxide as a chemical compound that has been linked to corrosion and industrial applications. I mention that it is a major component of acid rain, that it accelerates the rusting of metals, and that it is involved in the deterioration of electrical components. I tell them that it can cause severe tissue damage in its gaseous form, that it contributes to the greenhouse effect, and that it has been found in nearly every river, lake, and reservoir in the country. I even mention that it is implicated in thousands of deaths every year, often through accidental ingestion or inhalation. Everything I say is technically true, but every statement is stripped of context. I do not tell them that the “severe tissue damage” is drowning. I do not explain that “accidental ingestion” happens when people drink too much water in dangerous circumstances. I do not mention that the “greenhouse effect” contribution is simply water vapor, which is a natural part of the Earth’s climate system. Instead, I let the ominous language do its work. The students hear “corrosion,” “industrial applications,” “thousands of deaths,” and they think they are dealing with a dangerous pollutant. They do not think of the glass of water on their desk. They do not think of the rain falling outside. They do not think of their own bodies, which are made up of more than fifty percent of this so-called deadly chemical. When I ask for a vote on whether it should be restricted, many of them vote yes. Some are skeptical, but they are in the minority. And some are simply waiting to see which way the room is going. That hesitation is important. What I want them to understand is that misinformation is not just about people getting facts wrong. It is about the social dynamics that make us trust the wrong sources, follow the crowd, and reward the most sensational claims. The dihydrogen monoxide trick is a controlled experiment in how easily we can be manipulated when we are not paying attention to the difference between facts and context.
The reveal changes everything. When I write H₂O on the board, there is a moment of confusion, then a wave of recognition, and then the laughter. The students are relieved, embarrassed, and annoyed. They accuse me of playing a mean joke. But I push them further. I ask them to look back at every claim I made and identify which ones were false. They cannot find any. Every statement I made was true. Water really is dangerous in the right circumstances. It really is used in industrial processes. It really does cause corrosion. What made the whole presentation misleading was what I left out. I never told them the common name. I never gave them the full context. I never balanced the dangers with the benefits. And because I was their teacher, someone they trust, they did not push back. This is the deeper lesson about how misinformation works in the real world. A claim does not have to be fabricated to be misleading. Facts can be cherry-picked. Context can be stripped away. Loaded language can be added. The messenger can be someone we trust, or someone who looks trustworthy, or someone who has mastered the visual grammar of credibility. This is how conspiracy theories work. This is how viral misinformation works. It is not always made up out of thin air. Sometimes it is built from real facts, twisted just enough to tell a false story. My students begin to see that the danger is not just in lies, but in half-truths. A lie can be debunked. A half-truth is harder, because the pieces are true. The trouble is the way they are arranged, the way they are selected, and the way they are presented to us. Once my students understand this, they are ready to learn the tools they need to defend themselves.
After the reveal, we move from the trick to the actual skills. We talk about lateral reading, a technique used by professional fact-checkers. Instead of staying on a website and trying to judge its credibility from the inside, you open a new tab and search for what other sources say about that website, that author, or that claim. You do not trust the source’s description of itself. You look for outside evidence. This sounds simple, but it is a skill that has to be practiced. We also talk about the different types of information that fill our feeds: news, advertising, opinion, entertainment, and propaganda. Each type has a different purpose. News is supposed to inform. Advertising is trying to sell you something. Opinion is trying to persuade you. Entertainment is trying to amuse you. Propaganda is trying to manipulate you. If you cannot tell the difference between these types, you cannot decide how much to trust them. And the numbers show that young people are struggling with this. A 2024 News Literacy Project survey found that only eighteen percent of teens correctly answered all three questions asking them to distinguish among these basic information types. Eighteen percent. That means most teenagers cannot consistently tell the difference between a news article, an advertisement, an opinion piece, and an entertainment post. That is not because they are unintelligent. It is because they have been raised in a digital world where the lines are intentionally blurred. Influencers disguise advertisements as personal recommendations. News outlets run opinion pieces alongside news stories. Entertainment shows use real footage to make fake stories seem real. The platforms themselves reward all of this because it keeps people engaged. Without explicit instruction in news literacy, we are sending young people out into this world without the tools they need to navigate it.
The final part of the lesson is about action. I ask my students to create a “Stop Before You Share” corrective message. The idea is simple: before you share anything, slow down long enough to ask a few basic questions. Who made this? What evidence supports it? What might be missing? Does this deserve your trust? Those four questions are not complicated, but they interrupt the automatic behavior of sharing something that made you angry, or scared, or excited. The goal is not to make students cynical. Cynicism is the belief that nothing can be trusted and no one is worth listening to. That is not what I want. I want healthy skepticism, which is the willingness to ask questions while still being open to evidence. I want students who are harder to fool without becoming impossible to inform. There is a difference between being a critical thinker and being someone who rejects everything. I tell my students that the answer to misinformation is not to stop trusting all information. It is to trust better. It is to ask better questions. It is to recognize that being immersed in information all day does not mean they know how to sort through it. Just because they have grown up with smartphones does not mean they understand algorithms. Just because they know how to make a viral video does not mean they can spot a bot. These are taught skills, not innate instincts. And they are not taught enough. My students usually remember the day I tricked them with water. The groans and laughter stay with them. But I hope they remember the more important part too: facts matter, but facts without context can still fool you. They need to know that the world is full of people who want their attention, their anger, their fear, and their trust. The best defense is not to build a wall around yourself, but to learn how to look more carefully, listen more critically, and think more slowly. That is what news literacy is all about, and it is why I will be sharing this lesson with other educators at the National News Literacy Conference in Salt Lake City. I am just a journalism teacher from Palm Beach County, but I believe that if we can teach young people to recognize a trick as simple as dihydrogen monoxide, we can help them face the far more sophisticated misinformation that waits for them beyond the classroom doors.