[header] How to write an informative essay [title] Understand your assignment. [step] If you're writing for school, confirm the essay's required length and any topic parameters. This helps determine how much information you'll need to gather and present. 
Check your syllabus and any assignment prompts or sheets first; if you still need clarification, ask your teacher. [substeps] Be sure you know how your teacher wants you to cite your sources so you can keep track of what you research.