In April 2008, the National Youth Leadership Council released the K-12 Service-Learning Standards for Quality Practice. These standards grew out of a need to update conventional wisdom about quality practice as reflected in the Essential Elements of Service-Learning. Recent research shows that while some of the essential elements predicted outcomes for service-learning participants, others did not.
The research that informed the development of the Standards for Quality Practice also resulted in a revision of the Four Stages of Service-Learning or PARC model. In the PARC model, service-learning was conceived as a cyclical process with four interlocking phases: problem identification and preparation for service, the service activity itself, reflection, and celebration and future planning. In 2008, RMC Research published a revised description of the core components of service-learning, typically referred to as IPARDC (see the full text in Service-Learning in Action):

From K-12 Service-Learning Project Planning Toolkit, by RMC Research Corporation and the National Service-Learning Clearinghouse.
In the 2009 toolkit Service-Learning in Community-Based Organizations: A Practical Guide to Starting and Sustaining High Quality Programs, Eugene Roehlkepartain explored the applicability of this model to the community-based setting. There, he revised the IPARDC model to include the component “sustain.”

From Service-Learning in Community-Based Organizations: A Practical Guide to Starting and Sustaining High-Quality Programs, by Eugene C. Roehlkepartain.
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