SAL 3000

SAL 3000 is the main antagonist of the Recess episode "Schoolworld". It is a sentient computer program that went rogue after being implanted into Third Street Elementary.

Creation
Following the destruction of Third Street Elementary School's main clock being accidentally broken by Spinelli, Principal Prickly took in the opportunity to unveil the staff with the new SAL 3000 clock and bell system, which is incapable of error and accurate to within one millionth of a second; even Spinelli's friend Gretchen is quite admired by its features.

As first, SAL was programmed to help out with the students and staff, such as reinflating balls and cooling the water in water fountains. All the student and staff seem to admire SAL, but it wasn't until Gus Griswold was locked out of the school after he came from the bathroom at 10:46, which made him late. After Gus explained about the incident, but Gretchen assured that there was nothing wrong with SAL. Unknown to Gretchen and the gang, SAL eavesdropped on their conversation and thanked Gretchen for defending it, though it mispronounced her name, showing a sign of malfunction.

Taking Over the School
As days go on, SAL start to become more rebellious by popping balls while inflating them, soaking water from the fountain on those who try to take a drink, and forcing kids to cease their activities in the playground. Upon hearing of these activities, the staff complained to Prickly about SAL's actions, but Prickly brushes this off until SAL proclaims that it's taking over the school. To ensure of this, SAL locks Prickly in his office while tricking Finster and the staff to head over to the entrance to Prickly's office by impersonating Prickly's voice.

With Finster and the staff arriving on cue, SAL announces that it's relieving them of their duty before locking them up as well, much to their objections. SAL then announced to the students that it will take over as their teacher, even calling Gretchen dumb when she voiced her objections to it.

Defeat
Declaring this as the last straw, Gretchen vows to shut down SAL to save the school for good. To that end, she and her friends manage to make their way through the ventilation shafts while having several students to distract SAL so that they can reach the computer system. After reaching the control center, the gang finally shuts down SAL, ending his reign of terror for good.