Music is a universal language! Teachers can always use music in order to make lessons and studying much more interesting. There are teachers who teach music. Others teach communication through modern means. Is there anything open source and free? Yes there is! And it's Mixxx.
It has everything you need to start making DJ mixes in a tight, integrated package. Whether you're a basic learner in class or at home, you're DJing your next house party, spinning at a club, or broadcasting as a radio DJ, Mixxx has what you need to do it right.
Here are some interesting links: