freeCodeCamp.org

freeCodeCamp.org is a non-profit organisation, registered as a charity in the United States, that teaches maths, programming and computer science for free. Alongside the YouTube channel it runs a free interactive learning platform at freecodecamp.org.

The channel is a huge library of full-length courses, many several hours long. Topics include programming languages such as Python, Kotlin and JavaScript, web and mobile app development, system design, cloud computing, cyber security and artificial intelligence. Courses are taught by a range of experienced developers and educators, usually as hands-on projects you can follow along with. New courses appear every week, so the library keeps pace with new tools and languages.

Some highlights include:

A system design course covering how large apps handle data, caching, content delivery and heavy traffic.

A hands-on introduction to cyber security and ethical hacking, showing how systems are attacked and defended.

A beginner’s course in Kotlin, the language used to build many Android apps.

The channel has around 11.9 million subscribers.

Software engineering is one of the largest areas of engineering employment, and you can start learning it for free today. These courses go far beyond school level, and many are used by people retraining for tech jobs. It suits students considering computer science, software engineering, cyber security or a digital apprenticeship. Pick one course and finish it before starting the next.