Elizabeth Ramsey

Dean Ramsey is described as a trim woman in her forties, slightly on the heavy side, with watery grey eyes, and severly tied red hair. Has the ability to keep an eerie sense of calm and happiness about her even while punishing offenders.

• Medel calls Ramsey "Liz"
  

Gregory Harvey

Gregory Harvey is one of the co-directors of the Dalton Academy Warblers. He is described as taller and older then Sylvia Medel, with warm brown eyes, and a deep voice. He is quiet and calculating.

• Harvey and Medel slow dances together in Warblers' hall when they're by themselves.
• Medel and Harvey used to go out in high school. After high school, we went to college on opposite ends of the country and it was years before she  saw Greg again. She met him when she came back to Dalton to teach music. She'd been teaching co-ed choirs before and she wanted to experience teaching a single-gender group—she remembered Dalton had one so she came here.
• Harvey was taller than Julian, so he was over 6 foot.

Sylvia Medel

Sylvia Medel is one of the co-directors of the Dalton Academy Warblers. She is described as a tall beautiful woman, with platinum blonde hair cut into a short bob and wearing silver rimmed glasses. She seems to have taken a special interest in Logan's case; she defended him in front of his father, and is seen trying to coach him to overcome his medication issues. Also known to make amazing post-performance brownies.

• Medel calls Ramsey "Liz"
• Harvey and Medel slow dances together in Warblers' hall when they're by themselves.
• Sylvia used to go to St. Patrick.
• Medel and Harvey used to go out in high school. After high school, we went to college on opposite ends of the country and it was years before she  saw Greg again. She met him when she came back to Dalton to teach music. She'd been teaching co-ed choirs before and she wanted to experience teaching a single-gender group—she remembered Dalton had one so she came here.

Bradley Murdoch

Murdoch is the football coach and the literature teacher at Dalton Academy. He is a large man with a booming voice. He is known for his prejudice against Windsor House; going so far as to dock marks and accuse David of copying a senior student's paper. He seems to have quite a temper. He is also the reason that Blaine quit the football team. His bullying is nicely called 'setting a standard of excellence'. The Fandom has nicknamed him Snape.

Todd Howard

Howard is described as a tall, sprightly man. He has a loud voice usually used to yell at his various Windsor charges. Howard has been the Windsor Head of House for nearly twenty years. 

Janice Abernathy

A stern woman, who has been locked in a long standing battle with Dwight. Dwight was banned from the library after throwing rock salt in the shelves, and Mrs. Abernathy has been trying to keep him out ever since. Seems to believe that the twins are fairly innocent.

Lily Blumenfeld

She's the art teacher - she taught the art class that introduced Blaine to Joshua and Reed, and that was the class that Blaine got his 'White Rabbit' nickname from the Tweedles.

Timothy Tamerlane

The caretaker at Dalton Academy. He was attacked by Dwight who was 'ghost hunting' in the old cathedral while Mr. Tamerlane was cleaning. The brand on his arm has still not dissapeared. Is the owner of a pet duck which was involved in an accident including a mop and a RockBand set. Also, he owns a duck. Around the Warblers. This is not smart.

Murray Newman

Teaches the Ecology and Environmental Studies class, according to Dwight only a possesed or suicidal person would not pay attention to him outlining the exam coverage.

Eloise Saint-Clair

Teaches French at Dalton Academy. From the boys banter we can assume she is a strict professor.

Ms. Rydell

 Dobry Glee coach.

Ms. Caldwell

Ms Caldwell is Katherine's dance teacher at Dobry.

Mr. Minnow

• He was a teacher when the fathers of the current boys were at school.
  
• Assumed to be retired.
  

Ms. Wexon

• She takes swearing very seriously and doesn't allow anyone to swear, including words such as "Shizz" and "Crap"
• Charlie once called Justin an “idiotic fucktrumpet” in her class and she almost fainted.

Madeline Summers

She is the school nurse, mentioned in passing by Harvey, she was the one who informed him of Blaine's illness. The twins had contacted her during the blizzard that snowed everyone in for the episode Temperature, needing her advice about Blaine's fever.