This is actually a really good song if you aren't a Star Trek fan or just not a fan of the series. Anyway, the vocalist sings quite clearly. All you have to do is play the song for your students and let them fill in the gaps. As per usual, they will need to hear the song at least 3-4 times. By the way, there are several versions on YouTube. Some people prefer the Rod Stewart version. The Star Trek version is sung in a little more straight forward way.