"oh sure no problem. Erm...oh" He said, realizing that he couldn't indicate things on the map with only his head. 
"hang on a sec"

Shade whistled like he was calling a dog and a few seconds later his body hit the ground rather heavily. "That was surprisingly painful"
His body turned into a sort of mush and quickly reformed itself so that he could stand up and show Innocentia how the map worked.

"This center part is the main school building where all of the classes take place" He explained, indicating the largest building on the map "Some of the rooms and coridoors move themselves around and you'll occasionally find that one of your spell classes results in changing the way you have to get home again but the map should change itself to reflect the difference. Look there goes one now!" As he finished speaking one of the corridors marked 'Adv. Potions' faded away and was replaced with 'Mens W.C.'

"It can be a little confusing but the map has colors that show you were all your classes are. If you look at your papers there should be a color codded list of your classes, shouldn't be to hard to get around after a while"