For a wide variety of subjects, often with structured courses:
* Coursera: Offers courses from top universities and organizations worldwide, ranging from introductory to advanced levels. Many courses are free to audit, but you pay for certificates.
* edX: Similar to Coursera, offering university-level courses, often with more focus on STEM subjects. Also offers free auditing and paid certificates.
* Udacity: Specializes in tech-focused courses, often with a more practical and project-based approach. Many are designed for career advancement.
* FutureLearn: Offers courses from universities and other institutions, focusing on a diverse range of subjects. A good mix of free and paid courses.
For more professional development and skills-based learning:
* LinkedIn Learning (formerly Lynda.com): Excellent for professional development, with a vast library of courses on business, technology, and creative skills. Subscription-based.
* Udemy: A massive marketplace of courses on almost any topic imaginable. Prices vary widely, and quality can be inconsistent, so read reviews carefully.
* Skillshare: Focuses on creative skills like design, photography, and video editing. Subscription-based.
For specific subjects or niche skills:
Many organizations and institutions offer their own online learning platforms. For example, if you're interested in a specific programming language, you might find dedicated resources from that language's community.
Things to consider when choosing:
* Your learning style: Do you prefer video lectures, reading materials, hands-on projects, or a combination?
* Your budget: Some platforms offer free courses, while others require subscriptions or one-time payments.
* Your learning goals: What do you hope to achieve by taking online courses? Are you looking to improve your skills, earn a certificate, or simply learn something new?
* Course quality: Read reviews and check the instructor's credentials before enrolling in a course.
I recommend browsing a few of these sites and looking at the course catalogs to see what best fits your needs. Start with a free course to test out the platform before committing to a paid subscription or certificate program.