Distinguish Between Topic Outline and Sentence Outline
It may have additional levels of sub-sub-points if you feel that is necessary. The basic idea of a formal outline is that different types of letters or numbers (I, A, 1, a, i) represent different levels of the hierarchy of your paper, and sub-levels are indented below main levels.
Most outlines move from the general to the specific in each section. The outline should begin with an introduction that lays out the general ideas of the paper and includes a thesis, and then move on to points that support the overarching thesis. Each section should also move from the general to the specific. The heading of each section of the outline should be a general idea in support of the thesis. Under that main idea is supporting information—specific evidence about your subject that bolsters the idea.
It is probably the equivalent of a topic outline, with topics listed for each unit, and readings and assignments under each. After each heading in a topic outline for an essay, a maximum of several words is used to identify the topic or idea that will be discussed under the given heading. In a sentence outline, the thesis and topic sentence of each supporting paragraph are fully written out. The sentence outline forces part of the essay to be written out in sentences before the first draft.