OH MY GOLLY GOSH GOSH!

It regards student teaching.

STUDENT TEACHER

noun

a student who is studying to be a teacher and who, 

as part of the training, observes classroom instruction 

or does closely supervised teaching 

in an elementary or secondary school.

It actually regards the long-withheld-but-recently-disclosed identity of my cooperating teacher.

COOPERATING TEACHER

noun

a classroom teacher who volunteers to host a student teacher, 

thereby giving up the task of teaching his/her class to the student teacher 

and serving as the student teacher's primary mentor.

Today, I was informed that my cooperating teacher will be...

Mr. P! 

MR. P.

proper noun, abbreviation

my former cooperating teacher for my 3-week field experience 
at the start of the school year!

Remember his class? They are the ones who sent me these:

I am SO excited!

Watch out, world! This woman is about to become a student teacher!