One of the yellow vans used by Rafe's men to gain access to the school is seen parked by the front of the school when Ozzie drops off her sister. A couple scenes later this same van makes its entrance to the school when the security guard gets shot with a tranquilizer dart.
Oz's computer is shown to be downloading at 115200 baud over a dialup modem. Not only is this not possible (dialup topped out at 33.6/56k), but the modem shown is v.23. v.23 modems operate at 1200 baud (1.2k) and were already very outdated by the time of this movie (33.6k) [v.34] was already in wide use.