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

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

Degree enrollments slowdown in the US, headwinds for Consumer and Business in Europe.

An in-depth guide on the best online courses for learning TensorFlow. Learn Google’s popular ML library!