Structuring the essay

Structure means how something is arranged or organized. The essay has three parts namely: the introduction, the body, and the conclusion.

The introduction

Introduction as the name implies gives the insight to what you're writing about. The introduction should be captivating to keep your readers interest. A good beginning makes a good end.
Take for example; this example will appeal to you and my gain is your enthusiastic interest. Check out this example.
         Starting school
Starting school was like being a child in the middle of a candy shop. Everywhere I turned, I found an exotic treat, something I wanted to taste. But I couldn't taste everything much less consume it all. A child who eats too much candy develops a stomach ache. A student who joins too many clubs has too little time for course work, and must suffer the pain of low grades.

This intro would captivate your readers with their view to finding out what you latter did starting school. There will same time clear their suspense

The body(middle).

The body of the essay is the real content. It involves the development of main ideas related to the introduction. Thus, the body of the write up is made up of paragraphs which deal with the major points raised in the outline.
     You are advised to use inter paragraph transition markers to alert the reader of the movement of your topic or ideas. Some transition markers for development of the body of the essay in paragraph include:
Secondly, next, finally;  or you could use this other enumeration method: one way is .............., A second factor is..... Etc

The conclusion (End)

        Here, you are required to conclude major points in the preceding paragraphs as whereas the introduction sets the pace and tone of your essay, the conclusion clinches the points made in previous paragraphs. The conclusion takes different forms depending on the topic at issue. It may be a summary of main points discussed. In this case, you are safer if you use synonyms to avoid a mere rehash.
      You can evaluate the main points discussed in order to show their importance. You could use a quotation to clinch the main points raised. The conclusion could be in the form of a rhetorical question which the essay had already answered etc.
Example:
Looking critically at my case, don't you think it wasn't easy starting school? Conclusion to starting school