Decide who you are writing your speech for, what details you want included and how many minutes it will be. Narrow your topic to a specific topic. For example, write about the results on mental development of children who were abandoned. Research abandoned children or draw upon your own knowledge. Information is available by searching the Internet on "abandoned children."
Write a shocking statistic or interesting fact about abandoned children at the beginning of the speech to draw the audience's attention. Back up the statement by citing where you got your information. Educational websites, government websites, magazines and books are among the most credible sources of information.
Write the body of your speech by including interesting information about your topic. For example, if you are writing about the effects on development when a child is abandoned, include psychological studies and case reports.
Summarize your main points in your closing. End the speech with a memorable statement that will impact and stay with the audience.
Imagine you are the average audience member as you read the speech aloud. Ask yourself if you are interested in the topic throughout the speech and if the information is too vague or too detailed. Make any adjustments to the content as needed to keep the audience engaged.