The first link below gives you an example of a summary of the poem; but, be careful not to plagiarize. Depending on the type of assignment (whether it requires one paragraph or five) think about what your teacher wants you to learn from the poem. Some of the major themes are self-control, self-mastery, and leadership skills; so consider these when writing the assignment. Summaries usually ask students to retell what they read in their own words. Read each stanza and try to write one sentence about its main points. Do that with each stanza and you should be close to the number of words that you need. Of course, don't forget to use your own formal style of writing for academic papers. If you still aren't sure about what to say, read the poem again, or read more from the study guide here on enotes for more ideas. Again, links are provided below.