Don’t pick a very large font like Arial Black or Lucida Handwriting. Your teacher will notice that you are trying to make your essay longer by choosing a larger font.
If the increase is too noticeable, then try 1. 15 or 1. 1 instead. Because all documents are left justified, avoid increasing the left margin. Adjusting the left margin will produce a noticeable change that your teacher will detect.
Additionally, if you are quoting or paraphrasing research or literature, make sure to cite it properly. Citations can add extra length to a paper as well.
Expand your introductory paragraph with an attention-getting statement to hook the reader in.
However, try to avoid being descriptive when it is unnecessary since this may cause your paper to appear embellished or sound verbose.