Free online courseIntroduction to Computer Science

Course Description

Want to understand how computers really work and start building things with code? This free online course is a practical, beginner-friendly entry point to computer science, designed to help you think like a problem solver and develop foundational programming skills that transfer to many tech careers. You will learn how to break down complex tasks into clear steps, turn ideas into algorithms, and choose the right approach to make programs efficient and reliable.

The journey begins with computational thinking and visual programming concepts that make core ideas intuitive, then moves into low-level fundamentals where you see what is happening under the hood. From there, you will practice writing code, understanding how instructions are represented, and avoiding common pitfalls such as arithmetic limits and unexpected behavior. As your confidence grows, you will work with arrays, sorting, memory, and the building blocks behind data organization, which are essential for writing faster and cleaner programs.

Next, you will connect programming to the real world by exploring how the internet and the web function. You will understand how computers communicate, what happens when a browser requests a page, and how HTML and CSS shape what users see. You will also step into modern development with Python and server-side web programming, learning how to structure applications so they stay maintainable as they grow. Finally, you will learn how databases fit into software, using SQL to store, query, and manage information—the backbone of countless products and services.

Throughout the course, exercises reinforce learning and help you move from passive watching to active skill-building. By the end, you will have a stronger mental model of computing, more fluency in programming concepts, and the confidence to continue into software development, web projects, data work, or further study in technology.