We also sing songs that relate to our current unit and use those songs to find our sight words such as like the Martin Luther King Jr song.
Another way we incorporate our sight words into our singing is I find videos on YouTube that also display the words. A class favorite is this version of jingle bells. I know you tube can sometimes bring up some scary stuff, so a use a site called safe share that makes all of that stuff go away. I will write more about that soon, but the picture below is from that site.