Can someone clarify this for me... about Ranma's teacher (Hinako), is she 
a kid or an adult? Or does she just change forms when pressure is applied 
on the appropriate pressure points? I've seen a couple of fanfics 
mentioning her but I still can't get this straight.

 Miss Hinako is a kid. To clarify her condition somewhat, aahhhh, where 
to begin? Well, it was Happosai. He gave her a special technique that 
sucks the power out of her victim, and transfers it to herself, a side 
effect of which makes her grow older temporarily. The pressure points 
thing is a healing technique that, applied daily over the period of a 
month (guess how easy THAT is!), would make her unable to use her technique.

Actually, she isn't a kid. She's an adult... It's just that her body grows
to her true age when she sucks in the energy. Notice that she didn't turn
into an adult back when she WAS a kid, even after sucking out all the
fighting spirit of the nurses.

Kun-chan...