Hellementary School

The  is a limited-time premium building that was released on October 4, 2016, as part of Act 1 of the Treehouse of Horror XXVII Event. It rewarded the player with 175 MAG Points once built.

It was re-released on October 3, 2017, during the Treehouse of Horror XXVIII Event as a possible prize in the Magical Mystery Box.

It returned on October 3, 2018, during the Treehouse of Horror XXIX Event and again on October 23, 2019 during the Treehouse of Horror XXX Event. It was a possible prize in the THOH Mystery Box.

It was re-released on October 14, 2020, as part of Act 1 of the Treehouse of Horror XXXI Event. It was the second prize to be won in the event's Act 1.

About
Bart finds an Aramaic inscription on a desk. Lisa uses an app to translate it, which transports the pair to Hell, which is a school. Bart excels in the diabolical subjects and asks his parents if he can study there permanently. Bart succeeds in all of his classes in Hell. For his final test, he must torture Homer. Despite Bart's hesitation, Homer lets him. A disfigured Homer proudly watches Bart graduate as valedictorian.

Regular
Bart Beelzebart Lisafer Torture Coach
 * Get Straight A's in Evil - 8h
 * Review Torture Schematics - 8h
 * Clean Up After Hell Class - 12h
 * Research Private Equity for Hellenomics - 24h
 * Deliberately Tank Homework Assignments - 60m
 * Research Ways to Escape Hell - 12h
 * Serve Hell Detention - 24h
 * Oil His Whips - 60m
 * Grade Torture Class Homework - 12h

Quest Based
Lisafer Old Scratch Torture Coach
 * Take Everything Old Scratch Can Dish Out - 2h
 * Annoy Old Scratch With Pluck and Quips - 5h
 * Fight the Devil - 3h
 * Accept a Satan-Off - 60m
 * Mope Back to Hellementary School - 2h

Event Quest Based
Bart Beelzebart Lisa Old Scratch
 * Explain Twisted Torments - 2h
 * Get an A in Corporate Lobbying - 4h
 * Review the State of the Art in Torture - 4h
 * Get Chased Back to School by a Demon Car - 60m
 * Make a Deal With Old Scratch - 60m
 * Get on Fellow Students' Bad Side - 2h
 * Do Poorly in Class by Being Good - 4h
 * Try to Moralize Torture Science - 4h
 * Get Chased Back to School by a Demon Car - 60m
 * Serve Hell Detention - 4h
 * Make a Deal With Lisa - 60m
 * Gloat - 4h

Trivia

 * Only one can be purchased.
 * It can be placed on grass, pavement, or dirt.
 * It's currently one of the only two buildings that earns at 20-hour intervals. The other is the Battle Dome.
 * Both buildings are premium.