I need to make song lyrics out of grammar notes? Any suggestions?

I have to do a project for english in which i pick a song and create lyrics to fit into the beat. The lyrics are taken from our grammar notes all about main and subordinate clauses and adverb and adjective subordinate clauses. Any suggestions about what song i should use? It can't be too fast and the beat should be pretty simple because we're being graded on the legibility of the lyrics :) And also this is important where can I find the song with no singing only the music?