Well, this is my fantasy as to how things could have made Professor Umbridge mad during that year.  Warning this is an OotPs Spoiler

I own nothing of the following – JK Rowling & the other copyright holders, etc. own them.  Just using the characters in a fan fiction story – no money earned. 

Chapter 3: Licensure and Quills

Miss Delores Umbridge

Hogwarts School of Witchcraft & Wizardry

Dear Miss Umbridge

We are sorry to inform you that your application for a permanent teaching license has been denied. 

Your application was denied because of the papers being filled out by more than two different people. We know you will want to complete this year out as the term is nearly complete.

However, in the future you will find no school will be allowed to hire you as a teacher.  Until, or unless, you have properly filed papers in our office.

Martha D Stinkwood

Office of Teacher Licensure

International Wizarding Education Association

New York NY USA

CC: Mr. Cornelius Fudge, Minister of Magic-London, England

A Letter from a Hogwarts Student:

International Wizarding Education Association

New York NY USA

Dear Sirs

I currently attend Hogwarts and need to talk to someone about a problem at our school.

I would like to bring our new appointed High Inquisitor to your attention.  She has used her position in the Ministry of Magic to take over Hogwarts.  Her decrees are awfully painful to everyone.  One of the first ones was to disband all student organizations, teams, etc.  Then force us to regroup under her rules.  Three of my own houses Quidditch team (Gryffindor) has been banned for life by her.  With brooms locked up no less.  She seems to hate Harry Potter especially and has really tormented him by having him sit detention with her.

Not sure what you would call her special quill though.  She uses it in detention a lot and makes us write lines.  This quill has the ability to use our blood to write on the parchment and whatever we are writing causes painful writing to appear in our skin then it bleeds.

We are afraid to contact the Ministry of Magic – our Minister is a real git.  My parents do not work for the Ministry and therefore does not care if I write to you.  Most of us in Gryffindor House are unable to write due to the Ministry positions ones parents hold.

The High Inquisitors name is Delores Jane Umbridge.

Please investigate soon.

Thank you.

Lee Jordon

Gryffindor House

Hogwarts School

P.S. She reads our mail too!   Send any responses to me at the Hogsmeade Post Office Box LJ5.