[Private] Fandom High. (For Zenith.)
 

The fanominterdimesonal high school appear floating in the middle of nowhere space. It had green grass and all the adminitries that a school for children from different worlds.

Dipper smiled as he entered the secret school. Hidden in the Journal, he found out how to access it along with his sister Mabel, whom he suspected was trying to find a boyfriend again. He was so excited, he wasn't looking as he ran straight into a bald monk. "Sorry," Dipper said as he adjusted his hat. "Are you ok?"

Dipper smiled as he helped the taller boy up. "You're in Fandom High," he explained as she showed Aang a picture of the school in the journal. "It's a magic high school in another dimension!" he claimed. "According to the journal, those that lives interesting lives, who are between 15 and 18, can come," he explained eagerly.

"What?" Dipper asked. "Oh, no. This hat was given to me by Wendy. She is the coolest person that you will ever meet...if she's here," Dipper said, unsure if she would be. "Well, now you're here," Dipper said as he looked through the book. "One more thing you should know, students are allowed to spank each other for any and no reason. And what's an Avatar?" he asked.

"Umm, the definition of Avatar is a a representation of another thing," Dipper offered. "And yeah, no idea. Like I said, "another dimension." I am not from wherever it that you are from," he said. "Why, is it a title like a prince or duke?" he asked.

"No," Dipper said, struggling to explain the concept of dimensions and reality to someone who didn't seem to be that well educated. "Think of it like I am a human from a another planet, far away," he offered.