#1 - June 5, 2018, 7:43 a.m.
Headmistress title
#2 - June 5, 2018, 11:19 a.m.
If you are wondering about the related Archeology quest to obtain the Key to Nar'thalas Academy, then those are on rotation. Every 2 weeks a new one will pop up in Dalaran, so make sure to check back there occasionally.
On a sidenote, websites like WoWhead.com may have some more info or suggestions on it all. :)
Good luck!