In a well-constructed first paragraph, that first sentence leads into three or four sentences that provide details about the subject you address in the body of your essay.
These sentences should also set the stage for your thesis statement.
In 2006, when Nancy Pelosi became the nation’s first female Speaker of the House, one woman’s voice rang out clearly.
With this development, democracy grew to its truest level ever in terms of women’s equality.
The historical event also paved the way for Senator Clinton as she warmed her own vocal cords in preparation for a presidential race.
The body of your introductory paragraph should fulfill two functions: It should explain your first sentence and it should build up to your thesis statement.
Correct Analysis: Is the position you're taking one which is justified by the evidence you present?
Are you making any logical leaps which are not based on the information you're providing?
My strong suspicion is that they will prefer to see the word written out the first time, and will want to use the key only secondarily (if they forget an abbreviation.) Always keep the four C's in mind when you write: Clarity, Clarity, Clarity, and Clarity.
Writing essays and research papers can be a nerve-wracking experience for many students.