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Toan Truong Profile picture
@ToanTruong_
Jan 16, 2023 • 12 tweets • 6 min read • Read on X
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Harvard University is offering free online courses.

No application or fee required.

Here are 10 FREE courses you don't want to miss:
1/ Justice - Michael Sandel

This introduction to moral and political philosophy is one of the most popular courses at Harvard. The course includes readings from Aristotle, Locke, and Rawls...

Check here 👇
pll.harvard.edu/course/justice…
2/CS50's Introduction to Computer Science

CS50x is Harvard's entry-level course teaching students problem-solving, algorithms, data structures, and web development using C, SQL, JavaScript, and HTML...

Check here 👇

edx.org/course/introdu…
3/ Exercising Leadership: Foundational Principles

This course will help you explore strategies for leading in a changing world where adaptive pressures will continue to challenge all of us.

Check here 👇
edx.org/course/exercis…
4/ Fundamentals of Neuroscience, Part 1: The Electrical Properties of the Neuron

Learn about neurons and their electrical properties through interactive simulations and exploring a lab. Conduct your own DIY neuroscience experiments.

Check here 👇
edx.org/course/fundame…
5/Rhetoric: The Art of Persuasive Writing and Public Speaking

This 8-week course teaches how to form an argument and effectively communicate beliefs in a polarized climate, studying rhetoric from MLK Jr., JFK, MCS, Reagan, and more.

Check here 👇
pll.harvard.edu/course/rhetori…
6/ The Path to Happiness: What Chinese Philosophy Teaches Us about the Good Life

Harvard's popular course "The Path of Chinese Philosophy," taught by Professor Michael Puett, is now available online.

Check here 👇
pll.harvard.edu/course/path-ha…
7/ Science & Cooking: From Haute Cuisine to Soft Matter Science (physics)

Learn the science behind food and conduct your own kitchen experiments with this 16-week course on mayonnaise and more.

Check here 👇
pll.harvard.edu/course/science…
8/ CitiesX: The Past, Present, and Future of Urban Life

Explore the evolution and future of cities through case studies and expert insights in this 11-week course, featuring cities such as London, Rio, NYC, Shanghai, and Mumbai.

Check here 👇
pll.harvard.edu/course/citiesx…
9/ The Einstein Revolution

Unlock the secrets of physics with this 17-lesson course on Albert Einstein's impact on 20th-century physics, including relativity and quantum mechanics.

Check here 👇
pll.harvard.edu/course/einstei…
10/ Leaders of Learning

This course is designed to help you gain a deeper understanding of your personal theories of learning, and equips you with the tools you need to shape the future of education.

Check here 👇
edx.org/course/leaders…
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More from @ToanTruong_

Toan Truong Profile picture
Sep 2, 2025
A "cognitive bias" is a systematic error in thinking that ruins decision-making.

The 12 most powerful cognitive biases I've found: Image
1. Parkinson's Law:

Work expands to fill the time given.

When we have more time, we tend to procrastinate and become inefficient.

A good reminder to track your tasks duration and energy level. Image
2. Goodhart's Law:

When a measure becomes a goal, it stops being a good measure.

I.g: Exams and standard admission shifted the focus of education.

It's no longer about the students, but about grades and pay. Image
Read 16 tweets
Toan Truong Profile picture
Aug 29, 2025
This is the most powerful experiment on human potential:

The Pygmalion Effect.

It’s the true root cause why most people stay stuck, depressed, and never reach their true potential…

Here's a 4-step protocol to break the cycle today: 🧵 Image
1964. A small elementary school in California.

Psychologist Robert Rosenthal walks in with a dangerous question:

"What if intelligence isn’t fixed?"

What if it’s malleable—and can be changed by nothing more than belief? Image
Image
So he tested every child’s IQ.

Then he RIGGED the result.

Rosenthal randomly chose a handful of kids and told their teachers:

“These are your ‘intellectual bloomers.’ They’ll make exceptional progress this year.”
Read 16 tweets
Toan Truong Profile picture
Aug 27, 2025
People are now using “Buy Now, Pay Later” for $1000 Coachella tickets, $10 burritos, and even $4 Starbucks drinks.

No interest.
No credit check.
No strings attached.

You've been lied to.

BNPL is actually one of the sneakiest money scams ever built... Let me explain: (THREAD)🧵 Image
As a Vietnamee, BNPL is just starting to grow in Vietnam.

But in the West?

You can now finance burritos, deodorant, and even concert tickets.

This isn't just about money. It's about psychology, debt, and what no one teaches you in school.

Let’s break it down...
1. What is Buy Now, Pay Later (BNPL)?

Services like Klarna, Affirm, and Afterpay let you split a purchase into 4 interest-free payments.

It sounds smart. Flexible. Convenient.

But the way they *design* it is the real trick.
Read 13 tweets
Toan Truong Profile picture
Aug 26, 2025
One night in 1899, Nikola Tesla detected some mysterious signals from his tower.

He believed it came from Mars, Jupiter, or even aliens from another universe.

What he heard was much more fascinating: [THREAD] 🧵
Nikola Tesla was already famous in 1899.

His electrical inventions changed the world.

But that year, alone in his Colorado Springs lab, something happened that haunted him forever.

Something he couldn't explain... Image
Image
Tesla had built a massive experiment.

Goal: Send electricity through the air without wires.

His lab had the world's most powerful transmitter.
It could detect the tiniest electrical signals.

One night, it picked up something impossible... Image
Read 11 tweets
Toan Truong Profile picture
Aug 21, 2025
You can't think your way out of anxiety, depression, stress, or overthinking...

They are not in your head, but also not in your genes...

Pills numb the alarm while the fire burns.

Here's a guide to detox the organ that is destroying your mental health: 🧵 Image
Image
Let's envision someone named Tina.

CEO of a tech startup.
Crushing it professionally.

Heart pounding over emails.
But waking up at 3 AM with ruminations.
Convinced she was "just an anxious person."

Familiar? Image
Image
Your brain is actually 3 brains stacked on top of each other:

• Neocortex (Human brain) - Logic, language, planning

• Limbic (Mammal brain) - Emotions, memory, bonding

• Reptilian (Survival brain) - Fight, flight, freeze

Guess which one controls your anxiety? Image
Read 25 tweets
Toan Truong Profile picture
Aug 20, 2025
This was Winston Churchill's darkest WWII secret.

Inside this hidden bunker, 6 men were buried alive to spy on Hitler's troops.

Exiled from the world with only 7 years of supplies

Their story was classified for decades...

Welcome to Operation Tracer: 🧵 Image
By 1940, Europe was in chaos:

- France had fallen.
- Italy joined Hitler.
- Britain stood alone.

Gibraltar, the gateway to the Mediterranean, was the lifeline.

Lose it, and Allied supply routes would collapse. Image
Image
The Rock became one of the most valuable pieces of land in the world.

Churchill knew the Axis wanted it.

If they took it, Britain’s naval presence in the region would be crippled.
Read 21 tweets

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