There's sometimes a perceived notion of start-ups that they're easy to, well, start up. Simply take your idea, grab a web domain from a reliable company, set up your site and boom, you're practically a millionaire after several months. While the Elon Musks of the world make it look like a simple venture, getting a start-up off the ground is no easy feat. It's a struggle from the beginning, which is why it's always so fascinating to watch start-ups succeed from literally nothing. With that in mind, some of the more interesting start-ups of late have been those focused on the education industry. Apps such as Duolingo and Coursera have blazed the way in this regard, but they're not the only ones looking to educate the public and cash in on it at the same time.

Treehouse

Treehouse is a great app for anyone looking to branch into the tech industry. It aims to get users job-ready within months without the crippling fees that come part and parcel with code camps and university degrees. Its business model revolves around breaking down the barriers that are preventing people from getting educated, and teach them everything from building a website to learning how to code to constructing an app.

Skillshare

Skillshare is essentially a digital classroom that allows you to take classes with you wherever you go, provided you have a smartphone, tablet or laptop to view them on. The classes on offer are diverse: anything from animation and graphic design to more business orientated subjects such as marketing and entrepreneurship, all the way to coding and other technological disciplines. The community consists of millions of members and allows students to connect with each other, as well as directly with teachers for limitless learning.

DataCamp

As massive amounts of data accumulate and become more and more a part of our everyday lives, studying that data and knowing how to interpret it becomes a very saleable skill. DataCamp offers courses dealing with data science, allowing users to participate in classes of varying lengths, acquire new skills within the field, practice those skills and apply them to real-world problems and hands-on data projects.

Busuu

As a rival to Duolingo, Busuu is a language-learning app that focuses on grammar, vocabulary, and even conversations. It offers lessons in over 12 different languages. It also has a handy offline mode, meaning you can take your lessons wherever you go, even if you don't have internet at that moment.