Advanced Education Department

The Advanced Education Department (先進教育局) is a now-abandoned establishment in Academy City, it was used to educate and facilitate the care of Child Errors during it's time in operation. It is a large facility, with an open space that is used by the children to play on; it also has a large laboratory for experiments, as well as classrooms and showers for children.

Background
Under the supervision of Kihara Gensei, Kiyama Harumi who has gotten a license on teaching, is tasked on teaching Child Errors as so they can be prepared on the upcoming experiment on controling espers AIM diffusion fields. However, the experiment goes awry, putting the children into a comatose state; no immediate medical assistance was given to the children after the experiment, as Gensei forced everyone to collect the data gathered from the experiment and to keep quiet on what has transpired. Because of these events, Kiyama Harumi quits the facility and the children are sent to various hospitals around Academy City.

It is later revealed that the experiment was a cover-up by Gensei, it's true nature was to analyse the nature of out-of-control espers, even then it was also a cover-up for his experiment on the Crystallized Esper Essence.

Level Upper Incidents
The building is first seen when Misaka Mikoto accidentally connects with Harumi's memories after electrocuting her.

Poltergeist Incidents
Having a hunch of the recent Poltergeist earthquakes happening all around the city, Mikoto infiltrates the building in hopes of finding the clue. She once again meets Harumi in the building, having been recently released, and trying to search for data on the Crystalized Esper Essence that was used on her students. They leave the facility shortly, after Mikoto accidentally reactivate the security system of the building.