Number of students per classroom during the reporting period.
Organizations should footnote all assumptions used.
This metric is intended to capture the number of students per physical classroom at the organization during the reporting period.
This metric is multi-dimensional with regard to the five dimensions of impact. It may help describe the WHO dimension when the stakeholder group represented by the metric is the stakeholder group targeted by the investment or organization. It may also help measure the HOW MUCH Scale dimension, which helps estimate the number of the targeted stakeholders experiencing the outcome. For more on the alignment of IRIS metrics to the five dimensions of impact, see IRIS+ and the Five Dimensions of Impact (https://iris.thegiin.org/document/iris-and-the-five-dimensions/). No single metric is sufficient to understand an impact; rather, metrics are selected as a set across all dimensions of impact. When possible, the selection of metrics to measure and describe the five dimensions should be based on best practice and evidence.
June 2022 - IRIS v5.3 Released (current version)
Immaterial change. Minor revision to usage guidance for clarity.
January 2020 - IRIS v5.1 Released
No change.
May 2019 - IRIS v5.0 Released
No change.
March 2016 - IRIS v4.0 Released
No change.
March 2014 - IRIS v3.0 Released
No change.
November 2011 - IRIS v2.2 Released
No change.
February 2011 - IRIS v2.1 Released
No change.
September 2010 - IRIS v2.0 Released
Immaterial change. Student to Classroom Ratio (PI5501) replaced Student to Classroom Ratio (ED15). IRIS ID / metric name changed due to framework upgrade. Minor revision to definition language for clarity.
September 2009 - IRIS v1.0 Released
New metric. Students to Classroom Ratio (ED15) was developed via the Original IRIS Working Group.
IRIS Metrics Work Better in Sets
To use IRIS metrics—and the resulting data—to understand impact performance, IRIS metrics should be used and analyzed in generally accepted sets and according to well-defined objectives. IRIS+ gives you access to generally accepted Core Metrics Sets aligned to common Impact Themes and Sustainable Development Goals (SDGs).