ISO/IEC TR 4339:2022 This document defines an abstract model and an indicator system framework for the evaluation of information and communications technology (ICT) in learning, education and training (LET). The abstract model accommodates requirements domains, including K12 education, vocational education, higher education and continuing education. The framework describes ICT service levels in the areas of learning, education and training, and aims to assist in quality processes associated with ICT in LET contexts.