Going to be shadowing a highschool, how does this work?

I never went to middleschool, was homeschooled. I just want to see how the highschool works and apparently I'm gonna go shadow someone, so any tips or help as to how that works would be greatly appreciated! It seems like it could be very awkward. Also can I bring my iphone while i have nothing to do?

You'll just be following the daily routine of a typical student: going to their classes, walking the campus, eating lunch. No iphone in classes, bring a book to read, or a sketchbook.