As classification is about categorization of items or different entities into various groups, the classification essay topics should have a common principle of dividing the required terms. However, the students must use their innovative and analytical skills to explain the meaning of these terms and then interpreting the same, so that they are allocated to the proper group or subgroup. Therefore the students need to choose the topic for their essay according to the principle of classification, which they employ for writing their essay.

One common aspect of all essays is the format that needs to be followed by the students, while writing their academic assay assignments. Therefore, an example of essay writing is a tool that can guide the student on the general layout of any type of the essay. However, the essay formats being same, the contents and the methodology as well as the structure of the essay will change with the subject of the essay.