What are the 5 Structures required to write a good essay?
Personally, I'm not aware of a "5 structures" rule, if someone is, he/she can enlighten us...
But generally speaking, an essay could be "broken" into 3 parts: introduction, development of your arguments, epilogue. Regarding the introduction, it should include a thesis. Bare in mind that a thesis is a different thing than a controlling idea, in the sense that a thesis must include your personal view on the matter.
If, for example, you're writing an essay about urban overgrowth:
Controlling idea statement:
"In our times, the three most important problems affecting the quality of life are urban overgrowth, environmental pollution and unemployment"
"From all the problems of our time, the most important one is urban overgrowth."