Did you know where does the electronic music you hear every day come from?
First, you have to visit the black music chronology. You will find it in this link.
Secondly, listen to the original version of Michael Jackson's "Rock this World". Then, listen to its remix by Frankie Knuckles. Which are the differences between them?
Don't forget to check out wikipedia's Disco music page! You can also listen to Gloria Gaynor's "I am what I am" and ask for further information to Professor Xavi Santandreu.