How online courses providers shape their sites and content to appeal to the Google algorithm.

What if I told you that one man’s frustration with an elevator breakdown led to the creation of the fastest-growing and most-beloved programming languages today? Seventeen years ago, Graydon Hoare’s ordinary evening turned pivotal when an out-of-order elevator at his apartment building forced him to trek up 21 stories. A Mozilla software engineer, Hoare’s frustration wasn’t just with the climb, but with the fact that the tools of his trade couldn’t even make an elevator that works without cras

In Q4 2025, Duolingo announced it would let go of $50M in bookings to reach 100 million daily active users (DAUs) by 2028; a strategy Class Central covered in detail last month.  2026 is its “investment year,” and Q1 was the first quarter of execution. So far, the plan seems to be working. The Expected Results: Low Bookings, High DAUs Duolingo is running multiple tests to improve the free experience: spoken tokens for speaking practice, Speaking Adventures for real-world conversations, and fla

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%

Coursera’s annual report gives us a deeper look into the company’s finances.

Free certificate courses from Johns Hopkins, Stanford, Brown, and other top universities and med schools.