Segmented Sleep

We're on the unit on sleep in my intermediate speaking and listening class, and since the students think sleep late means go to be late at night (or stay up late), I explained terms like sleep in and sleep late (intentional) versus oversleep.  I did a song to the tune of "Frere Jacques":

Are you sleeping?

Oversleeping?

Please wake up.

Please get up.

You stay up too late nights

Listening to those sound bites/bytes

Please wake up.

Please get up.

Are you sleeping?

Oversleeping?

Get up now.

Stay up now.

Get up.  Go out.  Get on.

Ride, get off, and then run!

Get to class

So you’ll pass.

Are you drowsy?

Close to dozing?

Nodding off?

Nodding off?

Get up in the morning.

Listen to the warning.

Red alert!

Don’t get hurt.

But the most significant thing was my mention of segmented sleep--something I didn't even have a name for until I looked it up just now to see whether I could find an explanation in simple English.  This is how I sleep, and I explained that sleeping, waking up, and then sleeping again was the natural way to sleep, according to experiments.  This was news to me--Me, normal?!--just this year or last, but it's gotten a lot of press in the past year, and it's actually recommended because it's considered healthier and keeps people from lying awake worrying about not sleeping when they could be getting up and doing what they feel like doing.