Average Class Size 2017-2019 (Preliminary)
The New York City Department of Education (NYCDOE) reports on class size twice a year with a preliminary report in November and an updated report in February. This report is the preliminary report.
Open in the graph · Relate this dataset · What these columns mean
Freshness
The publisher's promise
How the agency that publishes this data says it keeps the data current.
Dormant
- Says it updates
- Historical data
- Actually updates about every
- —
- Publisher last updated the data
- Nov 6, 2025
Our mirror
Whether our copy of this data is current with the source.
In sync
- We last synced
- Nov 6, 2025, 5:13 PM
- Rows in our copy
- 69,681
- Rows at the source
- 69,681
- Our copy trails the source by
- under a minute
Columns
Each source column, with the name and type we use to store it.
1 of 16 columns carry a concept; 16 carry a description from the publisher. Read the concept column before you join. A column with no concept carries no claim from us, and a name that looks like a key is not one.
| Source field | Display name | What the publisher says it is | Concept | Source type | Stored as | Stored type | Row identifier | Unit |
|---|---|---|---|---|---|---|---|---|
number_of_students | Number of Students | The total number of students enrolled in a course | Not bound | Number | number_of_students | numeric | — | |
district | District | NYC school district | school_districtinvestigated | Text | district | text | — | |
number_of_classes | Number of Classes | The total number of classes offered for a course | Not bound | Number | number_of_classes | numeric | — | |
minimum_class_size | Minimum Class Size | The number of students in the smallest class by school, grade level, program type, department, and subject | Not bound | Text | minimum_class_size | text | — | |
average_class_size | Average Class Size | The average number of students in a class | Not bound | Number | average_class_size | numeric | — | |
month | Month | Month and year combination indicating whether the report is preliminary (November) or updated (February) | Not bound | Text | month | text | — | |
grade_level | Grade Level | The grade level for which the course is offered | Not bound | Text | grade_level | text | — | |
maximum_class_size | Maximum Class Size | The number of students in the largest class by school, grade level, program type, department, and subject | Not bound |
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This file was produced on Aug 25, 2026, 10:13 PM.
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Source and attribution
Where this data comes from, which version we hold, and what we changed.
- Source
- https://data.cityofnewyork.us/d/cfuy-6eha
- Version
- Content hash:
4f0be4ad4c3298216bf78e46b80fa24babde450927f8792baa28ae0924c8de76 - What we changed
- We did not change the data. We stored it as published.
- Publisher
- codenownyc
- We retrieved it
- Nov 6, 2025, 5:13 PM
Update history
| Started | Kind | Result | Rows written | Produced by |
|---|---|---|---|---|
| Aug 25, 2026, 2:12 PM | full_replace | success | 69,681 | codenow-nycmesh-container-oci.jfrog.io/codenow/citytap-pull:0.1.71 |