| A | B |
| AC | The Academic Building (where most classes are taught) |
| BAPA | Brewster Academy Picture Address (book with pictures and addresses) |
| WISC | Wechsler Intelligence Scale for Children (used to generate an IQ score where 100 is average) |
| BMP | Behavior Management Plan (system of demerits for tardy, homework, dress code |
| CLP | Community Living Parent (dorm parent responsible in each dormitory) |
| DC | (students who are not in dress code are noted in the portal) |
| TOEFL | Test Of English as a Foreign Language (a standardized test for international students to assess their level of English and used for admission to college. Highest possible score is 120 combined Reading, Listening, Speaking, Writing) |
| EDS | Engaged Discipline System (process by which students earn being removed from disciplinary probation) |
| Bubble | Freshman Team Area (located on the third floor of the Academic Building |
| Proctor | Student leaders that assist in the dormitory (there is generally one in each dormitory) |
| EOY | End of Year (used on schedules in last few busy weeks of school) |
| PBL | Project Based Learning (projects designed, envisioned, developed and presented by students) |
| Esta | Estabrook Dining Hall (an Esta Fiesta is class held in the dining hall) |
| HC | Health Center (located in the front of Anderson Hall) |
| STAD | Student Team Achievement Division (a cooperative learning activity where students work in teams) |
| J-Board | Judicial Board (students who violate the rules are judged by a group of their peers who listen to all sides of the case and make recommendations to the Dean of Students) |
| SSAT | Secondary School Admission Test (a standardized test used for admission to private school. Highest score is 2400 combined Verbal, Quantitative, Reading) |
| JBS | John Brewster Scholar (the highest level of recognition given for high scores in all aspects of Brewster life in each recognition period) |
| K-Pac | Kaywin Performing Arts Center (a small Black Box Theater used for drama and other student performances) |
| DP | Disciplinary Probation (status given to students who seriously violate school rules) |
| NHS | National Honor Society (a national club celebrating students achievement) |
| Prefect | Student leaders that form the student government (there are 2 prefects from each academic team) |
| Rec | Recognition (used to describe the 6 recognition periods each academic year where student receive recognition scores for their performance) |
| SLEP | Secondary Level English Proficiency (a test that international students take to assess their level of English. Highest possible score is 67 combined listening and comprehension) |