Welcome to Tutorials.21-lessons.com!


Ready to learn software development?

Start Programming Today

Have you thought about learning how to write software before? Doesn't it sound like fun to build your own applications?

There are so many different programming languages and platforms to choose from! Mobile, Desktop, Web? For your first steps in a new environment, choose a platform and programming language that provides you with most flexibility.

Therefore, why don't you learn JavaScript, HTML and CSS? You can use JavaScript virtually everywhere these days: The Web Browser, Desktop, Backends, even on mobile devices!

If you are:

  • Curious
  • Creative
  • Up to learn something new every day

You should start learning today!


I'm Jan - nice to meet you. This is my collection of tutorials.

Jan - Portrait

I'm a full-time software developer and a teacher.

In May 2013, a friend of mine introduced me to Rails Girls Berlin (now Code Curious) and I became a coach, introducing women to the world of software development.

Since then, I taught many newcomers how to write their first line of code, some of them just to get a better understanding what their colleagues at work are up to, others to change careers and become a full-time software developer.