I find it helpful to be really intentional when I teach a Spanish song to students. I learned part of this process from my days as a counselor at Concordia Language Villages in MN.
The first time I play a song for a class, we just listen as we watch the video. Then I play it again right away but I give students a job–something to listen for in the song. For example, I might have students raise their hand every time they hear the word “rojo.” Or one side of the room listens for “rojo” and the other listens for “azul.” Then switch!
Once students are familiar with the tune, it’s time to start learning the words line by line. The first few times, I have students repeat the spoken words after me.
I might say:
“Clase, repitan, Él es rojo.” (they repeat)
“Él es rojo.” (repeat)
“Él es verde.” (repeat)
“Él es verde.” (repeat)
Next I have students repeat after me singing the lines. Then we sing those two lines together slowly a few times before we continue with the next two lines.
This song is fairly simple but keep in mind that for longer or more complex songs, it’s okay to just teach part of the song.