There is a whole world of art supplies out there waiting for you
You’ll need to make sure that your portfolio represents a diverse range of art media. Showing many art media is a way to demonstrate that you have taken the initiative to learn and hone skills in contrasting art media. Step outside of what you see everyone else in high school doing, which is probably limited to more commonly known art supplies like acrylic paint and pencils.
There are so many advantages to trying out new art media: you’ll gain a diverse, valuable set of skills as an artist and perhaps discover something along the way that you truly love! Of course, not every art media is going to be your cup of tea, but don’t knock it until you’ve tried it!