An overview of CS50P, Harvard’s Introduction to Python, and your path to a free certificate .

The 31 most popular free online university courses and MOOCs starting in June 2024.

Despite assurances of sustained instructor earnings, Udemy’s policy changes delivered a $30 million pay cut, sacrificing creator income to bolster its stock value.

Are you looking for a job or a new career? Here are 150 online courses to help. While most courses are useful for everyone, some are particularly aimed towards young people, while others explain how to apply for a new job later in life. Class Central founder and CEO Dhawal Shah wrote about an online course that helped him ace a technical interview and land a job in Silicon Valley in 2012. While many online courses teach technical skills, there are also plenty to help you write your resume and

Here are the best online courses and resources to learn Lisp and its most popular dialects: Common Lisp, Scheme, Racket, and Emacs Lisp.

TL;DR Duolingo reported Q4 2025 revenue of $282.9 million (+35% YoY), closing its first billion-dollar year, breaking estimates again. The stock dropped 22.5% anyway. Again. The company plans to slow down monetization to grow to 100 million DAUs until 2028, by focusing on teaching quality, giving more to free users, and growing non-language courses. Duolingo’s Q4 2025 results confirmed something we highlighted in its 2025 review: growth is slowing. The company crossed a billion dollars in r