At the beginning part of assistant principal resume, you can write the paragraph which describes about you as an assistant principal to be. You can deliver the details of your profile related to the job.
In this case, you put all words into descriptive paragraph. Then, you can just explain your competencies more details with list format on your resume assistant principal position.
On the next parts of assistant principal resume, you can write about your achievements and your experience related to the jobs. The achievement which you can write can be your educational achievement or your working milestones.
Meanwhile, you can add your administrative experiences at the time you work similarly as the assistant principal. Make your own assistant principal resume then.