Duolingo’s market value ($13.49B) now eclipses both Coursera and Udemy combined, driven by explosive user growth and surging quarterly revenue.

The first time you see Tailwind CSS, you might wonder whether someone accidentally pasted their stylesheet into the HTML. A single button can have a dozen classes just to control its spacing, colors, rounded corners, and hover effects. Are we really supposed to write all that? Each class does a small, specific job. Once you recognize them, you can style an element right where you’re building it, without jumping between files or thinking up another class name. The HTML gets busier, but making c

Subscriber growth and revenue are accelerating even as revenue per user declines. Udemy built its empire on a simple idea: anyone could create a course, and anyone could buy one. That marketplace model made Udemy famous and made millionaires out of its top instructors. Now the company is deliberately killing it. In Q3 2025 earnings call, Udemy’s CFO admitted they are “intentionally reducing” single course sales to push users toward subscriptions. The logic is straightforward: Udemy keeps 82.5%

Although I spend a lot of time at the computer and have taken more than 200 online courses since 2012, I’m still learning how to make the most of generative AI tools. I’m not a complete beginner in the world of AI, but definitely need to become more fluent in its use. In this respect, I found Google Prompting Essentials, created by Google Career Certificates, very helpful. This course, released in October 2024, provided plenty of ideas for creating and refining prompts in a variety of situatio