One of the goals of current education is to ensure that graduates can act as independent lifelong learners. Graduates need to be able to assess their own learning and interpret assessment results. The central question in this article is how to acquire sustainable assessment skills, enabling students to assess their performance and learning throughout life, and preparing them to meet their own future learning needs. This article presents an integrated model for developing sustainable assessment skills, consisting of three components: conditions necessary for the development of sustainable assessment skills, elements of sustainable assessment and instructional methods for guiding students in the development of sustainable assessment skills. The article concludes with suggestions for future research to further develop the proposed model. (Contains 2 tables and 2 figures.)