If you want to better understand the relationship between hardware and software, then you’d enjoy the Piper Computer Kit 2, which has you building a Raspberry Pi-powered computer. Using this DIY laptop, you can learn to code through its custom Minecraft Story Mode challenges, use the drag-and-drop Blockly language to learn physical computing, or just pick up some basic Python from the pre-installed lessons.

Want more one-on-one coaching and career prep without doing a full-time bootcamp? Try signing up for the subscription-model certification courses from Udacity or Treehouse, where you have the opportunity to ask a tutor for help instead of suffering your coding mistakes or questions alone. You can’t do much better than the $19 coding classes from Udemy (even less, when there’s a sale)—even full-time bootcamp and computer science students sign up for these classes to supplement their learning. 

No matter how many certificates and coding workshops you complete, or how many programming languages you learn, the proof of your coding skills will be in your programming project. While your personal project doesn’t have to be as ambitious as creating the next Google Maps, it should be something you’d want to work on 24/7 to constantly improve and expand its scope.

Code Avengers are based in New Zealand. They also offer Code Camps where there’s 1 to 3 days of coding training. These camps are located all over the world and in various states in the US.  You can learn coding languages such as C++, HTML, Python, game design and many many more. They also offer these courses in multiple languages, making it accessible to all.
Created in 2006 by educator Salman Khan, Khan Academy is one of the original free online-learning institutions. With step-by-step video tutorials, you can  learn how to program drawings, animations and games using JavaScript and ProcessingJS, or learn how to create webpages with HTML and CSS. See, especially, Khan's "Hour of Code," designed to introduce students to one hour of computer science and computer programming.
Khan Academy allows you to learn almost anything for free. Our Xbox app is the best way to view Khan Academy’s complete library of over 5,000 videos. We cover a massive number of topics, including K-12 math, science topics such as biology, chemistry, and physics, and even the humanities with playlists on art history, civics, and finance. Spend an afternoon brushing up on statistics. Discover how the Krebs cycle works. Learn about the fundamentals of computer science. Prepare for the upcoming SAT. Or, if you’re feeling particularly adventurous, learn how fire stick farming changed the landscape of Australia. Included in our Xbox app: - Watch all of our 5,000+ videos - Track your progress: Log in with your Khan Academy user account to get credit for watching videos, and see your achievements It doesn't matter if you are a student, teacher, home-schooler, principal, adult returning to the classroom after 20 years, or a friendly alien just trying to get a leg up in earthly biology; Khan Academy's materials and resources are available to you completely free of charge.

Second, Keybr.com measures your keystroke dynamics and collects comprehensive typing statistics. For example, it measures your typing speed for each individual key, and uses this data to generate random words putting emphasis on the weakest key. The more troubles you have with a particular key, the more you will be  typing it. It means, the generating algorithm will put that letter in every word in the next generated lesson. Your typing skills are re-evaluated after every completed lesson, and the next lesson will be adjusted accordingly.
EdX is another leading online-learning platform that is open source instead of for-profit. It was founded by Harvard University and MIT in 2012, so you know that you’ll learn about cutting-edge technologies and theories. Today, edX includes 53 schools. You probably can’t go wrong with the free Introduction to Computer Science from Harvard University.