Treehouse is a video focused technology education company that has hit $3.6 million in revenues [TNW]. The company has around 18,700 users and over 380,000 quizzes have been completed. Around 330,000 hours of tutorial videos have been watched on the website. The company went from 11 employees to 54 employees since 2011. The company will now be getting into print through a book series published by Wiley Publishing. They are starting with an HTML5 book. This will be followed up with a CSS3 and iOS 6 book. Treehouse created getting started courses for WordPress and then introduced jQuery lessons. They also launched courses on Android and iOS. They have funding from Chamath Palihapitiya, Reid Hoffman, Kevin Rose, and Mark Suster. Check out Treehouses’ YouTube channel to learn more about the company.