In tackling this assignment, you should first look up biographical information about Albert Einstein. I am attaching some links to good resources on enotes that will tell you about Albert Einstein and his life and accomplishments. There are more on enotes as well, I just don't have room for that many links! As you read, take notes about Einstein's biographical information, interesting facts, and contributions to science. These phrases and topics will be part of your poem.
Then, I would also look up quotes from Einstein. You may want to use a quote or two if you feel Einstein said something poetic and fascinating.
When you write, your poem does not have to fit a certain formula, unless the assignment calls for it. It could be free verse, with phrases and quotes making up lines. It would be really poignant if you could draw a connection to Einstein and our world today, such as answering, how is the world a different or better (or worse) place today because of Einstein's contributions?
This sounds like a very interesting assignment and could make for a really beautiful and deep poem!
Since you did not specify what type of poem you were needing to compose, how about writiing a haiku? If you are unfamiliar with this, it is a Japanese form of poetry which uses a 5-7-5 syllable pattern and is just three lines long. The lines do not have to rhyme. Here's an exampe about Albert Einstein:
German scientist (5 syllables)
Relativity theory (7 syllable)
Nobel Prize winner (5 syllable)