Content: Shift focus to your consumer
It is no longer news that the entire marketing landscape is shifting towards customer centricity. Instead of praising your high school and its services, you... do the same, but with wording that meets the needs of your target audience. Your speech is for applicants, about applicants, about their user experience in your university. Even the strongest brands need to turn their heads towards potential buyers of the product and literally voice their "pains" and the ways to solve their problems that you practice in your educational institution.
Point of interest
This point is related to the previous one. Unfortunately, many representatives of the universities jump at telling a story about university history, its regalia and achievements. Undoubtedly, that is important, but, in our experience, applicants and their parents cannot always connect this information with their user experience and ask more mundane questions: where will I live? Who will teach me? Will I have someone to ask for help? These requests are not universal; you must clearly understand who your target audience is. Having made its competent portrait, you can easily understand what is better to highlight in your presentation.
Everything is great at your university: education, science, extracurricular activities, campus, location, and individual tracks. And it's great! But in order for the applicant to have a holistic view of the university, it is better not to overwhelm him with a variety of information. Choose 2-3 key points that meet the needs of your target audience, and focus on them in your speech: this way you can be sure that the listener will definitely hear the idea that you want to convey to them, and these key points will remain in their memory. If it seems you do not provide enough information about your school, you can always suggest that applicants visit official website of the university or the university page at the exhibition website, which contains a more complete presentation.