As the saying goes, knowledge is power. But with the Internet’s birth relatively recently, knowledge can now become money. The e-learning market is expected to reach an astounding $400 billion, and there are many ways to join in. A good way to teach people about a subject is to write an eBook. There are a few ways to spread your new eBook. You could use Amazon’s Kindle direct publishing – it includes free tools for formatting, creating an interesting cover, promotion, and you can earn up to 70% royalties by publishing to Kindle readers. Another option is Barnes & Noble Press, with which you can self-publish both electronically and in print, and you can earn up to 60% royalties by publishing to NOOK readers.

Other than selling a book that you write online, there are many other services and products that you can sell digitally. You could build an app using easily manageable app-builders, like Buildfire, which doesn’t require any coding experience at all, or Zoho Creator, a drag-and-drop interface to build your newest app idea, or you could customize your favorite apps.

You can also sell the designs of original products that you thought of. With Etsy, you can curate your own online shop where you sell your own goods. Using Redbubble you upload your design to the site and to its product templates.

Sharing your knowledge online can be so profitable that even though it may start as a hobby, or small side hustle can turn into a fully fledged full time job in some cases. Even if it remains as a side job, adding a side job can increase an American’s monthly income by an average of 25%.

Find out more ways that you can make money off of ideas you have, how to share it with the world, and learn with tech to build your career here.