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Class Size Report
New York City Department of Education: Class Size Report Comparison of Methodologies
2012-2013 Methodology
For Grades K-9 (*indicates change from the 2011-12 methodology)
Data reported by:
- Grade level
- Program type
- Core subject and core course (for grades 5-9, where available)
Program types:
- General Education (Gen Ed)
- Integrated Co-Teaching (ICT) (formerly Collaborative Team Teaching (CTT))
- Self-contained Special Education (Spec Ed), by service level
- Gifted and Talented (G&T)
- Gifted and Talented and ICT (G&T and ICT) *
Methodology:
- Class size is calculated by dividing the number of students in a program and grade by the number of official classes in that program and grade.
- For schools where core course data is available for grades 5-9, class size is calculated by dividing the number of students in a course by the number of sections in that course, regardless of the grade level of the students enrolled.
- ICT sections that are coded as two separate sections for their General Ed and ICT student cohort will be matched together based on day, period, room, and Core course code.
Included:
- All official classes
- Grade 9 official classes are included in schools where it is the terminating grade (i.e. 6-9 schools)
- All courses identified by Core Subject from Table A as English, Math, Social Studies and Science for grades 5-9, where available in STARS. *
Excluded:
- Non-ICT bridge classes
- General education classes and course sections with more than 100 students
- General education classes and course sections with less than 5 students
- Self-contained official classes with less than 2 students, self contained core courses sections with less than 5 students
Source: ATS, STARS
For Grades 9-12:
Data reported by:
- Core subject
- Core course
- Program type
Program types:
- General Education (Gen Ed)
- Integrated Co-Teaching (ICT)
- Self-contained Special Education (Spec Ed)
Methodology:
- Class size is calculated by dividing the number of students in a course by the number of course sections in that course, regardless of the grade level of the students enrolled.
- ICT sections that are coded as two separate sections for their General Ed and ICT student cohort will be matched together based on day, period, room, and Core course code.
Included:
- All courses Table A below in grades 5-9, where available in STARS. *
Excluded:
- General education course sections with more than 100 students
- General education course sections with less than 10 students
- Self-contained course sections with less than 5 students
- Extended day and extended session courses
- Course sections scheduled for day 00 and 06
- Non-core middle school courses
Source: ATS, STARS Table A: Courses included in 2012-2013 report
| Dept Name |
Core Subject Description |
| English/ESL |
Communications |
| English/ESL |
Core ELA |
| English/ESL |
Journalism |
| English/ESL |
Literature |
| English/ESL |
Other English |
| English/ESL |
ESL |
| English/ESL |
Writing |
| Mathematics |
Calculus |
| Mathematics |
Integrated Algebra |
| Mathematics |
Geometry |
| Mathematics |
Technology |
| Mathematics |
Core Math |
| Mathematics |
Pre-calculus |
| Mathematics |
Other Math |
| Mathematics |
Algebra 2/Trig |
| Mathematics |
Statistics |
| Science |
Biology |
| Science |
Chemistry |
| Science |
Other Physical Sciences |
| Science |
Earth Science |
| Science |
Forensics |
| Science |
Agriculture |
| Science |
Health Science |
| Science |
Technology |
| Science |
Living Environment |
| Science |
Physics |
| Science |
Other Science |
| Science |
Astronomy |
| Science |
Core Science |
| Science |
Other Life Sciences |
| Social Studies |
Behavioral Sciences |
| Social Studies |
Economics |
| Social Studies |
Gov't and Econ |
| Social Studies |
Global History |
| Social Studies |
Law |
| Social Studies |
Geography |
| Social Studies |
Other Social Studies |
| Social Studies |
History of "_" |
| Social Studies |
Core Social Studies |
| Social Studies |
Other Government |
| Social Studies |
United States History Accelerated |
| Social Studies |
Participation in Government |
2010-11, 2011-2012 Methodology
For Grades K-9 (*indicates change from the 2009-10 methodology)
Data reported by:
- Grade level
- Program type
- Core subject and core course (for grades 5-9, where available)
Program types:
- General Education (Gen Ed)
- Integrated Co-Teaching (ICT) (formerly Collaborative Team Teaching (CTT))
- Self-contained Special Education (Spec Ed), by service level
- Gifted and Talented (G&T)
Methodology:
- Class size is calculated by dividing the number of students in a program and grade by the number of official classes in that program and grade.
- For schools where core course data is available for grades 5-9, class size is calculated by dividing the number of students in a course by the number of official classes in that course, regardless of the grade level of the students enrolled.
- ICT sections that are coded as two separate sections for their General Ed and ICT student cohort will be matched together based on day, period, room, and CoreSubjectID. *
Included:
- All official classes
- Grade 9 included in schools where it is the terminating grade (i.e. 6-9 schools)
- All courses identified by CoreSubjectID as English, Math, Social Studies and Science for grades 5-9, where available in STARS. *
Excluded:
- Non-ICT bridge classes
- General education classes with more than 100 students
- General education classes with less than 5 students
- Self-contained classes with less than 2 students
Source: ATS, STARS
For Grades 9-12:
Data reported by:
- Core subject
- Core course
- Program type
Program types:
- General Education (Gen Ed)
- Integrated Co-Teaching (ICT)
- Self-contained Special Education (Spec Ed)
Methodology:
- Class size is calculated by dividing the number of students in a course by the number of official classes in that course, regardless of the grade level of the students enrolled.
- ICT sections that are coded as two separate sections for their General Ed and ICT student cohort will be matched together based on day, period, room, and CoreSubjectID. *
Included:
- All courses identified by CoreSubjectID as English, Math, Social Studies and Science for grades 5-9, where available in STARS. *
Excluded:
- General education classes with more than 100 students
- General education classes with less than 10 students
- Self-contained classes with less than 3 students
- Extended day and extended session classes
- Course sections scheduled for day 00 and 06
- Elective courses
Source: ATS, STARS
2008-09, 2009-10 Methodology
For Grades K-9 (*indicates change from the 2007-08 methodology)
Data reported by:
- Grade level
- Program type
- Core subject and core course (for grades 5-9, where available) *
Program types:
- General Education (Gen Ed)
- Collaborative Team Teaching (CTT)
- Self-contained Special Education (Spec Ed), by service level
- Gifted and Talented (G&T)
Methodology:
- Class size is calculated by dividing the number of students in a program and grade by the number of official classes in that program and grade.
- For schools where core course data is available for grades 5-9, class size is calculated by dividing the number of students in a course by the number of official classes in that course, regardless of the grade level of the students enrolled *
Included:
All official classes
- All courses coded as English, Math, Social Studies and Science for grades 5-9, where available *
Excluded:
- Non-CTT bridge classes
- General education classes with more than 100 students
- General education classes with less than 5 students
- Self-contained classes with less than 2 students
Source: ATS, MSPA*
For Grades 9-12:
Data reported by:
- Core subject
- Core course
- Program type
Program types:
- General Education (Gen Ed)
- Collaborative Team Teaching (CTT); Note that sections with matching day, period, room and core subject, and combined enrollment less than 34, are assumed to be co-teaching situations. In the report, duplicated sections are subtracted as "MATCHED SECTIONS" and paired sections are added back as "ASSUMED TEAM TEACHING".*
- Self-contained Special Education (Spec Ed)
Methodology:
• Class size is calculated by dividing the number of students in a course by the number of official classes in that course, regardless of the grade level of the students enrolled.
Included:
- Courses where the core class flag is equal to “Y” in the following subjects:
- English classes (courses beginning with “E”)
- Science classes (beginning with “S”)
- Math classes (courses beginning with “M”)
- Social Studies classes (courses beginning with “H”)
Excluded:
- General education classes with more than 100 students
- General education classes with less than 10 students
- Self-contained classes with less than 3 students
- Extended day and extended session classes
- Course sections scheduled for day 00 and 06
- Elective courses
Source: HSST/STARS, ATS
2007-2008 Methodology
For Grades K-9:
Data reported by:
Program types:
- General Education (Gen Ed)
- Collaborative Team Teaching (CTT)
- Self-contained Special Educ (Spec Ed), by service level
- Gifted and Talented (G&T)
Methodology:
- Class size is calculated by dividing the number of students in a program and grade by the number of official classes in that program and grade.
Included:
Excluded:
- Non-CTT bridge classes
- General education classes with more than 100 students
- General education classes with less than 5 students
- Self-contained classes with less than 2 students
Source: ATS
For Grades 9-12:
Data reported by:
- Core subject
- Core course
- Program type
Program types:
- General Education (Gen Ed)
- Collaborative Team Teaching (CTT)
- Self-contained Special Education (Spec Ed)
Methodology:
- Class size is calculated by dividing the number of students in a course by the number of official classes in that course, regardless of the grade level of the students enrolled.
Included:
- Courses where the core class flag is equal to “Y” in the following subjects:
- English classes (courses beginning with “E”)
- Science classes (beginning with “S”)
- Math classes (courses beginning with “M”)
- Social Studies classes (courses beginning with “H”)
Excluded:
- General education classes with more than 100 students
- General education classes with less than 10 students
- Self-contained classes with less than 3 students
- Extended day and extended session classes
- Course sections scheduled for day 00 and 06
- Elective courses
Source: HSST, ATS
2006-07 Methodology
For Grades K-9:
Data reported by:
Program types:
- General Education (Gen Ed)
- Collaborative Team Teaching (CTT)
- Self-contained Special Educ (Spec Ed), by service level
- Gifted and Talented (G&T)
Methodology:
- Class size is calculated by dividing the number of students in a program and grade by the number of official classes in that program and grade.
Included:
Excluded:
- Non-CTT bridge classes
- General education classes with more than 100 students
- General education classes with less than 5 students
- Self-contained classes with less than 2 students
Source: ATS
For Grades 9-12:
Data reported by:
- Grade
- Core subject
- Program type
Program types:
- General Education (Gen Ed)
- Special Education: Self-contained by service level (12:1, 12:1:1, etc.), Mainstream
Methodology:
- Since high school classes may contain students in multiple grades and programs, class size is calculated by taking a weighted average of all the classes in a core subject area with students in a particular grade or program.
Included:
- English classes (courses beginning with “E”)
- Science classes (courses beginning with “S”)
- Math classes (courses beginning with “M”)
- Social studies classes (courses beginning with “H”)
Excluded:
- General education classes with more than 100 students
- General education classes with less than 10 students
- Self-contained classes with less than 3 students
- Extended day classes
Source: HSST, ATS
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