Billie Said:

How do you write a proper essay conclusion?

We Answered:

in concluding the essay -- you simple state what you have told the audience. In brief terms ... the mantra in college is --

A. Tell em what you are going to tell them

B. Tell em

C. Tell em what you told em.

So if you are using 3 supporting clauses introduced up top, you simple seque from the 3rd supporting clause to a recap of the proof of your thesis