Learn ethical hacking, vulnerability assessment, and pen testing with Nmap, Nessus, and OpenVAS. Plus, master pentest reports and security audits with top courses.

To get an overview of the topics and trends in the research on MOOCs, Class Central has created a list of the most cited research papers on MOOCs.

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

If you’re interested in learning the guitar, there’s a course for you. In this guide to the best guitar courses, there are several beginner courses to choose from, plus some specific styles to explore if you already know the basics. The guitar is a popular and versatile musical instrument. It’s portable (especially the acoustic guitar), and you can play melodies or strumming both solo and in a band. It lends itself beautifully to many musical styles, from flamenco to classical, jazz, blues, fol