The First 25 Years: Why Experience and Consequences Shape the Brain

 As a teacher, I’ve always been fascinated by how kids learn. Watching those “aha!” moments unfold in my classroom never gets old. But the more I dive into brain science, the more I realize those moments are not just about learning a math problem or finishing a book. They’re about how the brain is wired to grow through experience, especially in the first 25 years of life. And let me tell you that wiring is deeply influenced by consequences—both good and bad.

This idea isn’t just my opinion—it’s backed by science, much of which I’ve learned from Andrew Huberman’s podcasts and his incredible guests. If you haven’t listened to him yet, you’re missing out. He explains complex brain science in a way that makes you go, “Oh, that’s why I do that!” One thing that stuck with me is how neuroplasticity, the brain’s ability to change and adapt, is most powerful in the first 25 years of life. This is when the brain is primed for growth, learning, and reshaping itself based on the experiences we encounter. In other words, the lessons we learn during this time have a lasting impact on how we make decisions for the rest of our lives.

Why Consequences Matter

Here’s the thing about neuroplasticity: it’s fueled by experiences, and experiences come with consequences. Touch a hot stove as a kid, and your brain instantly learns, “Don’t do that again.” Score a goal in soccer, and your brain lights up with reward chemicals, teaching you, “This feels great; let’s work for this again.” These lessons aren’t theoretical; they’re biological. Huberman explains that dopamine, the brain’s reward chemical, plays a huge role in reinforcing behaviors, while stress and discomfort can shape avoidance behaviors.

As a teacher, I see this play out daily. A student forgets to do their homework and misses recess. That natural consequence (combined with a bit of a disappointed teacher look) often works better than any lecture. On the flip side, praise or a sticker for effort reinforces a positive habit. Over time, these little experiences accumulate, wiring their brains for better decision-making.

Teaching the Why Behind It

But here’s where it gets interesting—and where I think we often drop the ball as educators and parents. It’s not enough to just let kids experience consequences; we also need to teach them why their brain responds the way it does. This is something I’ve started incorporating into my classroom conversations, inspired by what I’ve learned from Huberman. For example, I explain to my students how dopamine works, like how their brain gets a little hit of it when they achieve something they’ve worked for. They think it’s cool to learn how their brains are wired, giving them insight into why they feel motivated.

I also talk about stress. We often avoid letting kids feel stress because we think it’s bad for them. However, according to Huberman, experiencing manageable stress actually helps the brain grow stronger. When kids understand that stress is a natural part of life and that their brains are designed to handle it, they start to see challenges not as something to fear but as opportunities to grow. Imagine if every child could internalize that lesson by the time they’re 25!

The Role of Responsibility and Ownership

Here’s the hard truth: shielding kids from consequences, whether it’s the sting of failing a test or the reward of working hard to succeed, doesn’t help them in the long run. The brain learns through doing, not being told. You can explain how to ride a bike for hours, but until you wobble, fall, and eventually find your balance, you don’t really learn.

Huberman’s podcast often emphasizes the importance of agency, that sense of control over one's actions and their outcomes. Giving kids responsibility for their decisions and letting them face the natural consequences of those decisions helps their brains wire for better choices. It’s not always easy to watch a child struggle, but struggle is where growth happens.

Why This Matters Beyond the Classroom

This concept isn’t just for kids. As adults, we often complain about bad habits or poor decisions, but how often do we stop to think about the experiences, or lack of them, that shaped those patterns? The good news is that while neuroplasticity is most powerful in those first 25 years, it doesn’t disappear entirely. Adults can still rewire their brains, but it takes much more effort, focus, and intentionality.

For our kids, though, the process happens naturally daily. The more we let them experience the consequences of their actions and teach them the science behind why their brains respond the way they do, the better equipped they’ll be to navigate life’s challenges. And who knows, maybe they’ll even grow up to appreciate the teacher who let them learn the hard way now and then.

So, whether you’re a teacher, a parent, or just someone who loves brain science, remember this: experiences and consequences shape us. Let’s make sure we’re using them to help the next generation build brains wired for resilience, good decisions, and a lifetime of growth.

Now, if you’ll excuse me, I need to go remind my students why turning in their homework is good for their brains, and their recess plans. Just kidding, we aren't allowed to do that =)