When the pupils are about to be killed they remove all of their clothing. It shows the girls bare shoulders, so bra's have also been removed. After Blake and Liana are in the pool and they are about to change clothes Liana has a bra on.
Although the movie is set in Austin, Texas, one scene includes footage from downtown Dallas.
About 36 minutes into the film, Texas Governor Dean Redding gives a speech wherein he says that, under his administration, Texas has a balanced budget. Unless the Texas State Constitution has been amended in the movie's universe, this should be nothing new, as the Texas Constitution currently requires the state government to operate under a balanced budget each and every year.
Why would they need to thin the kids with lower IQs? Laina's mother has what appears to be cancer, why would she not be "thinned", as well as all other sick and elderly people? Does this mean all children born with birth/mental defects are thinned at birth?