Ms. Marquez asks a new student to spell his name because she is not sure she understands it correctly. Spelling a name is probably the most common use of the alphabet for adults, and there are some great short videos available online for practicing this.
Here is some good listening practice from real-english with real people spelling their names.
But things get even better.
Send your students to Real English Lesson 3: The Alphabet where they can view the video and do exercises. They will get lots of focussed listening practice and will even be able to record themselves.