Here are the best free online courses to learn OCaml, a general-purpose, statically-typed programming language that is widely used in academia and research institutions.

This year, Duolingo announced a major strategic shift: from monetization to user growth, with a target of 100 million daily active users by the end of 2028. To get there, it needs to grow about 25% year over year, every quarter. In Q2 2026, daily users grew 23%, to 58.7 million, the first time growth has sped up in two years. Duolingo also disclosed a roughly $10 million bonus that pays out if Q4 growth hits 25% or more. Paid subscribers grew by about 200,000 in the quarter, the fewest since 2

The best courses to learn geology, whether for personal interest or if you are considering a career in the resources field.

OpenAI Academy is OpenAI’s newest attempt at organizing its growing library of tutorials, guides, and beginner-focused training resources. This platform offers a minimalist, ad-free learning experience where learners can watch short videos or read practical articles on how to use ChatGPT across different sectors. In this review, I take a closer look at the platform through the lens of one of its beginner courses: ChatGPT 101: Introduction to ChatGPT for Small Businesses. This 30-minute crash c