I have to write a pentameter peom about a person with iambic peantmeter and rhyming couplets with horatian staire. They dress painly, have a sweet, nice personality, teach math and drive a van.
It sounds like your poem assignment might be based on Chaucer's Canterbury Tales. Is this the case?
First, I suggest developing a clearer picture of the person your poem is going to be about. Horatian satire pokes fun at traits in humanity and ridicules human follies in a way that is not too harsh. What parts of the person's life or attitudes do you plan to ridicule? What is the point you wish to make in your poem?
Once you have a clear idea of the direction of your poem's content, then you can start worrying about the iambic pentameter. A line of iambic pentameter has 10 syllables, five stressed and five unstressed, in an unstressed, stressed pattern.
An example of an iambic pentameter line from Canterbury Tales is: "He was the finest beggar of his batch". Notice how this line has a dun DUN dun DUN dun DUN dun DUN dun DUN type of rhythm. That is what you want to strive for in your poem. As you are writing lines, try to exaggerate the rhythm and say them out loud to make sure they fit in the meter.
Rhyming couplets are two lines of poetry appearing in succession that have rhyming words at the end. Example (This happens to also be in iambic pentameter):
"A lad he had with him, a fine young squire,
A lover and cadet, a lad of fire."
Notice that the final word in each line rhymes.
This is a really challenging assignment! Good luck!