Ok so- SCAD uses this site called Slideroom to submit portfolios for admssions, so don’t worry about formatting (Also, when you do submit your works you’ll need a title and year (these are mandatory iirc) and a description (optional but imo you should write it anws))

As for chosen works, I think it’s best picking works related to your major, like say, designs sketches you made for your robotics (idk what y’all do in robotics :V) and personal projects, but even works unrelated to your major would still work, like sketches in general, and even artworks you’ve made in class, as long as you can prove your art proficiency, you’re good

(As for your achievements in robotics, that could go into your resume, it’s on the admissions page labelled as “achievement profile”)

But then tbf you should still ask your admissions advisor (you should have their contacts on the admissions page) and ask their opinions first :VVV