It is essential for the author to keep the audience in mind constantly, while typing assignments, because the primary role of the written article is to affect the readers and kindle them with a spark of interest towards the implications that are to follow. Whether it is an article on some aspects of nuclear physics or an essay for an AP World History homework help, its conclusion must explain to the reader clearly what the writer's concern behind all these arguments is. That is why the author should be asking oneself "So what?", while reinforcing the main body of the work with pleonastic evidence.
A good thesis conclusion always rounds up to the initial statement, which is a fruitful technique to make a composition that closes your reader's understanding in a circle. Also, it is good to address the introductory part with some similar words or constructions, because it helps the paper become more memorable. However, a simple repetition is non-constructive; the work will look much better fitted if you provide the reader with the synthesis of the main points.