How to write a good introductory and concluding paragraph

As we know, writing skill is a real challenge to many students. When asked about the skill they find the most difficult, most of the students think that writing causes them a lot of troubles and many of them have difficulties in generating a good introduction and conclusion of the essay. Hence, I am writing this paper to introduce some strategies to write a good introductory and concluding paragraph.

Parts in this paper are collected and edited from many informative books listed in the last page and it is divided into two following main parts:    

PART I. How to Write a Good Introductory Paragraph.

PART II. How to Write a Good Concluding Paragraph.