This action-research focuses on the use of digital technologies for educational assessment. The research has been made possible through an Industrial Training Research Convention (CIFRE contract of) contract with the company NEOPTEC, which develops assessment technologies. The aim is to analyze the linguistic practices enabling development of technologies and those enabling assessment practices. The corpus has been constituted through the observation of designers and users of technology. It relies on analysis of notes taken in professional situations, of sound and video recordings, which are explored using Conversation Analysis and Ethnomethodology, and of documents and digital traces produced through assessment activities. This research provides a reflection on technology’s role in the implementation of an instrument-based evaluation process and on its benefits for education.