What type of poem structure does, "Caged Bird" have

This poem definitely has no structure, unless you consider "unstructured" a structure.

Explanation:

The number of syllables in each line are not consistent, it tries to rhyme sometimes but not every stanza, there is repetition of the word "freedom".

closer examination, however, finds the mcdonald's kind of job highly uneducational in several ways. far from providing opportunities for entrepreneurship (the lemonade stand) or self- discipline, self-supervision, and self-scheduling (the paper route), most teen jobs these days are highly structured — what social scientists call “highly routinized.”  

true, you still have to have the gumption to get yourself over to the hamburger stand, but once you don the prescribed uniform, your task is spelled out in minute detail.  

d) sarah's natural reaction to being accepted into college suggests that she has no other dreams.