What are some creative ways to teach high school students?

Hello. I am a high school student igned to teach my peers about AJROTC general knowledge. The students are between 9th-12 grade. I'm trying to steer away from the traditional methods of teaching; textbooks, handouts, lectures, etc. (Boring!) The cl shoun't take that long; 30 minutes should do it. I was wondering if there was anyone out that that could give me any suggestions as to what I could use. Or if anyone knows how to use a program like PowerPoint to the fullest extent. (I was already thinking about PowerPoint Jeopardy.) I am all ears!