If you have a piano or keyboard already and just need the benefit of a little instruction in the right way to play, the best way to read music and a little music theory, Skoove can give that to you from the comfort of your browser. It's free to start, and if you need more instruction, it's not too expensive. We've discussed a few piano-teaching tools, including the browser-based Pianu and the iPhone and iPad-based Simply Piano, but the benefit of Skoove is that it's both browser-based (which means it will work on any computer) and it works best if you already have a keyboard or piano to practice with. The service listens to you as you play, and offers you real-time feedback on how well you're doing. You even see the best hand positioning on-screen while you practice, and you can go back over previous lessons to make use of its feedback.
As you progress, you'll also learn how to read music, and a good bit of music theory as well. The video above gives you a couple of examples, but aside from the promise of making you a concert pianist, it's a great and free way to get started, learn to play some classics and some popular tunes, and do it all with gear you already have. If you want more than the free version of Skoove offers, you can sign up for a premium subscription ($US10 [$13]/mo) which unlocks all of the lessons and songs -- which is still cheaper than an instructor, but obviously not at all comparable. Give it a try at the link below.