A narrative poem is just a story -- don't let the poem aspect of the assignment intimidate you! It doesn't have to be personal at all! Do you have a favorite childhood story or a favorite movie? Translate the essence of one of those stories into a poetic form. Consider the writing just a one focused scene so that you can concentrate on having great details and a nice mix of poetic devices in your poem.

Just to throw a couple specific ideas at you and see if they spark an idea of your own, how about:

• You are a babysitter and the child runs away. You have to find it.
• You have just been hired for your first job. Your car breaks down on the way to your first day of work.
• You are coming back from a concert with a group of friends and pick up a hitchhiker. He or she tells you a story.

A narrative means you're telling the story about something. Certainly, most people find talking about themselves and their experiences interesting, so that's an obvious possibility, but the main thing is to identify some subject that you will enjoy recording.

If you've seen a great concert or athletic event, you could tell about the anticipation, preparation, actual event, and the memories afterward. Recording the story of a trip you've taken could make for an interesting tale. If you want a challenge, write your poem about an argument you've had with someone - lots of descriptive vocabulary for all the emotions that came out!

You might want to narrate the story of your own life.  Wordsworth did this in The Prelude, so you have a good precedent!  Or you might want to narrate the life of someone you know well, such as a parent or grandparent.  Sample lines:

Lo, I'm the gal whose profile, seen by all,

Declares my love of playing volleyball.

(Just kidding)  :-)