This paper explains why learning, especially social learning, and evaluation are essential and integral parts of Integrated Sustainability Assessment (ISA). This is linked to the intent and purpose of ISA as a process that seeks to achieve transformative outcomes, including through issue reframing.The goals of ISA require a participatory process, adaptability and an iterative architecture with, at the end of each ISA cycle, a phase of purposefully structured evaluation of learning achieved. The paper explains how the evaluation of learning outcomes has been structured in the MATISSE project and reports findings from the first round of evaluation.