Summary : class rules and the literal most basics

Dress code : 

.close toed shoes

.no overly bulky garments

.no long hanging jewelry

.tie back hair if necessary

.wear dragon-hide gloves when necessary 

.wear goggles

potion : a magical solution made up of both magical and non-magical ingredients

Only a witch or wizard should ever consume or apply a potion. Muggle exposure to potions can cause unusual and often deadly side effects.

snake oil salesman : A phrase that reffers to muggles who sell things with false information about their affectiveness.

*I would like to add that it is recomended to read  'magical drafts and potions' for this class, but it is not mandatory.