It is not a bíg speech in the sense that it's long - compare it to the way Henry V spurs on his troops in the play that bears his name and you will find Macbeth is a man of few words. But in those few words he does manage to say a lót. The 'tomorrow-speech' is widely regarded as one of the finest bits of Shakespeare's writing.
For actors, the questions is always how to play it. How does Macbeth feel exactly? He has just heard about his wife's death but is he mourning her or does it merely trigger him to contemplate the uselessness of his own life?
We will watch Patrick Stewart delivering the speech (as well as the rest of the scene in class), but here are two more versions for you.
Also, Ian McKellen (Gandalf!) explains how he prepared this delivery of the speech. Might be useful for your own analysis!
Jon Finch in the 1971 film adaptation (in full medieval costumes)
(Skip the ad!)
Ian McKellen in the 1977 RSC (Royal Shakespeare Company) version
Ian McKellen's preparation - start at 01.56; He does mention stylistic devices!