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

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

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

Learn to identify, recruit, and manage influencers as a marketer, recent graduate, or business owner with these six influencer marketing courses.