Number of classroom hours offered to a representative student each week during the reporting period.
Organizations should footnote all assumptions used.
This metric is intended to capture the number of instructional hours offered to students each week during the reporting period.
In an example of how this metric might be calculated, suppose a school begins the day at 8:00am and ends at 2:00pm. Each day approximately one hour is spent on lunch, breaks, or other non-classroom learning time. Therefore, each day, each student is offered five hours of instruction. Students attend school five days per week. The reporting organization would then report 5 × 5 = 25 hours.
This metric differs from Learning Hours (PI1836) in that this metric captures school time offered, while Learning Hours (PI1836) captures actual time provided. For example, if a calculation as above yields 25 hours for this metric, but within the reporting period school was cancelled for four hours in total because of snow or other bad weather, in that case would Learning Hours (PI1836) = (25 hours × number of weeks in the reporting period) - 4 hours.
June 2022 - IRIS v5.3 Released (current version)
Immaterial change. Minor revisions to definition and usage guidance for clarity.
January 2020 - IRIS v5.1 Released
Immaterial change. Minor revision to Usage Guidance for clarity.
March 2016 - IRIS v4.0 Released
Immaterial change. Minor revision to definition language for clarity.
March 2014 - IRIS v3.0 Released
Immaterial change. Minor revision to definition language for clarity.
November 2011 - IRIS v2.2 Released
No change.
February 2011 - IRIS v2.1 Released
No change.
September 2010 - IRIS v2.0 Released
New metric. Hours of School Offered per Week (PD4120) was developed via the IRIS Taxonomy Development 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).