A small chunk of brain is floating in blue, created by a hologram that Arrietty can interact with and spin to her whim. And of course, all the tablets embedded in the desk have the same view. The rest of the brain floats beside it, minimised by the teacher.

"The Parietal lobe, is basically the control centre for touch." She says, picking up a compass for drawing circles and pressing it gently to her arm. "And is very good at discerning to different points of touch on our oberhautchen, sorry, skin. And of course, knowing the characters being written on an arm without any other visual input. If anyone wants me to demonstrate, give me a shout."

"Now, I've discussed with you last time what happens when your brain goes all square shaped." She tells them, bringing up last lesson on their tablets for a moment before putting it to the side for them to to look at if they missed it or want to go through it again. "

She spins the brain around and glances over the class, thinking on something before saying "I can tell you two things, truthful things. We live in a time of die Götterdämmerung. With many superpowers about. And of course, I know my brains. So if anyone would be willing to go under CT scans and stuff like that, come and see me."

"NOW!" She adds on, grinning widely. "We move onto the stuff that'd happen if we fucked with the Parietal lobe." She spins the lobe once more and a list of information appears beside it, detailing the adverse affects of damage to it.

"Damaging the parietal lobe can cause difficulties with telling the left from the right, problems with writing and and shitty mathematics skill. And you can't perceive objects properly. And that's just the left half. If you hit the right... Well you can up neglecting to wash and keep yourself clean. You can become a terrible artist and you end up in denial a lot."

She looks at everyone, raising her brow. "Hast du noch irgendwelche Fragen?"