There is now way to find out. I saw a few posts ago. Some of them said 350+ math and reading combined and 200+ points on writing. Others said 200+ points on each section. The thing is no one know the exactly points of increase. Also not sure if time is a factor on that as well.
Yeah, they are flagged. I know the waiting is so bad, but be proud of it since you are working hard to increase. Again, probably no one knows how much increase. Do your best guys!
i know one of my friends knew a girl whose scores improved from <2000 to near perfect between her first and second sittings, and the collegeboard make her take another test or something to see if she cheated on her second sitting.