In fairness, my Astro binder is only about 25 pages double-sided on this year's material, but the size is inflated because of sheet protectors and because I keep past years' DSO stuff in the back.
(chances are our Hovercraft team's binder is no more than a few pages)
Why binders in astro? I cant think of any benefit theyd have over laptops.
Some people find binders easier to organize or are able to locate pages faster with a binder. Also, some states, like Georgia, don't allow laptops for Astronomy so I'd imagine teams from states like those would invest in having good binders
Indeed, I typically found it easier to use binders, though I never referred to my notes much in the actual event. It was my favorite event, so it was fun to just print a news article, stuff it in the binder, read it, and highlight it...I'm a bit weird maybe. I do know, though, that when I competed, whether it was with a 3" or a 5", nobody could navigate their laptop faster than I could with a binder (we actually timed this once). Don't get me wrong, it's definitely possible to use laptops with *equal* success, but having more information with worse organization is ultimately worse.
B: Crave the Wave, Environmental Chemistry, Robo-Cross, Meteorology, Physical Science Lab, Solar System, DyPlan (E and V), Shock Value
C: Microbe Mission, DyPlan (Earth's Fresh Waters), Fermi Questions, GeoMaps, Gravity Vehicle, Scrambler, Rocks, Astronomy
Grad: Writing Tests/Supervising (NY/MI)