Here are the best online courses to learn JavaScript, the programming language mainly used by web developers to create interactive, dynamic websites.

Turn complex technical information into clear, concise, and reader-friendly documents with the help of these top technical writing courses.

Both Coursera and Udemy started 2025 with new CEOs. Greg Hart took over at Coursera in February. Hugo Sarrazin started at Udemy in March. Less than a month into the job, both CEOs were in conversations to sell their companies. On April 8, Hart and Sarrazin met for the first time at ASU+GSV. The rest, as they say, is history. In my 5,000-word analysis of Coursera’s acquisition of Udemy, I called the deal rushed. Two new CEOs, both less than a year into the job, merging two public companies. I w

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

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 Class Central lists online courses in 87 languages, courses made in English outnumber all of the others by more than six to one. English is therefore a useful language to know, even though some courses have subtitles in a range of languages. Earlier this year, we updated our list of courses to help improve your writing skills. These courses all assume some fluency in the language. But what if you do not know any English, or your English is very poor? If you do not have convenient acce