Across the education enterprise, assessment, teaching, learning and achievement standards are central. But the explication of what we want learners to know about specific disciplines and to be able to do in meeting these standards must be considered as instrumental as what we want learners to be and to become. Strictly speaking, Binet-rooted are not far from the mark in an effort to achieve distance from specific content covered in diverse national curricula. These scholastic aptitudes can be thought of as generalized developed abilities that not only reflect the capacity to handle academic work, but also, more importantly, they reflect abilities that result from high-quality education. Instead of scholastic aptitudes, however, we think the most appropriate term is competencies. These developed abilities are not so much reflected in the specific discipline-based knowledge a student may have acquired, but in the ability and disposition to use the meta-products of having learned to engage and solve quotidian and novel problems adaptively.Accordingly, the success in developing strong learners and dynamic contributors to American democracy and the global community hinges on the effectiveness with which we stoke intellective competencies across one's educational lifespan. This attention to increasing abilities within the learner is of special importance in reconsidering the troika of assessment, teaching, and learning. How it is that we understand the positioning and the privileging of assessment in the most effective interest of the learner is crucial. Assessment must be ordered and situated in a way that serves the learner, not in a fashion that has the individual as a student of the test, or as a blind consumer of information, therefore, sacrificing the assumption and application of knowledge. This emphasis on how it is that assessment will operate across teaching and learning is particularly important when considering shifts in ontological and axiological mores in education. Accordingly, the fiituring of epistemology-assessment and pedagogy in particular-is requisite in understanding present and potential abilities of the learner as central.Appraisal and assessment within education must move away from prediction and selection based on the measurement of developed abilities and toward diagnosis, prescription and placement, and must ultimately shift to learning situations involving the kinds of interventions that build intellective competence. Assessment for education in such a world-one where diversity, equity and excellence are concurrently privileged-will likely give more attention to the analysis of teaching and learning behavioral processes and situations than to the status of the learner's achievement. The status of one's developed ability will still be of some use, but primarily as it relates to an understanding of the processes by which abilities and competencies develop and are acquired in order to serve a dynamic learner-centric education scaffolding.This may be a challenge for traditional and colloquial approaches to measurement science, as well as to the learning systems that it should serve. Changes consequent in the fiituring of the patterning of the education cycle, as well as focus on learners as diverse and capable, irrespective of context and culture, is against conventional practice, if not conventional norms. Measurement science and the field of education itself have not resolved issues having to do with the juxtaposition of diversity and variation in human characteristics. Because of this, there is the need to intentionally push applied research agendas in which the diversity and variation at issue are inclusive of equity in access to appropriate opportunities to learn, and excellence in the quality of human performance. Competent attention must be paid to better conceptualizing these issues and pursuing research and development that goes beyond the adjustment of scores to compensate for lack of opportunity to learn; the search for evidence of bias in the tests or testing situation; and advocacy for social justice. …