Read the prompt thoroughly, taking notes. Group your notes into two columns, one for each perspective, putting evidence for each perspective into its own column.
Pre-write. There will be space allowed in your test booklet for this. Choose one of the positions given, or pick your own. Begin pre-writing by stating your position. Develop an outline for your essay. A typical ACT essay contains an introduction, three paragraphs expressing your main points, and a conclusion. State the main idea of each paragraph in your outline.
Begin your essay by clearly stating the issue and your position. Establish a context for the issue that presents both sides. For example, an essay on a prompt dealing with metal detectors in high school might begin, "Many experts have argued that metal detectors keep students safe, but in fact they are in invasion of students' privacy."
In the following three paragraphs, present three points that support your perspective. Use specific examples to back up your points. Use transition words like "although," "however" and
"additionally" to link ideas.
Vary your word choice and sentence structure throughout the essay. Limit your use of simple declarative sentences ("I believe X. This is because Y.") Use a sophisticated vocabulary, but restrict yourself to words whose meanings you fully understand.
Conclude your essay by summarizing your argument and the points you've made to support it. Refrain from introducing any new arguments or examples in the conclusion.
Carefully proofread your essay. Errors in spelling and grammar will distract the reader and lower your score.