This document discusses various frameworks for measuring social impact, including the Impact Reporting and Investment Standards (IRIS), the Global Impact Investing Rating System (GIIRS), and Social Return on Investment (SROI). IRIS is a catalog of standardized metrics that can be used to describe social, environmental, and financial performance. GIIRS is a rating system that assesses the social and environmental performance of impact investments. SROI is a framework for measuring and accounting for the broader concept of value created or destroyed by activities beyond just financial value.