With apologies, as usual, to the original author:

What class this is I think I know
The slides are on my laptop though
I did not look at them last night
I can’t be sure I know their flow

My Facebook friends must think it queer
That I am gone nine months a year
My eyes betray I did not sleep
But for this class? Affected cheer!

A student jolts himself awake
To ask if there is some mistake
The only other sound’s the hum
Of laptop fans before the break

These slides are lovely, dark and deep
But I have classes left to teach
And miles to earn before I sleep
And miles to earn before I sleep