Explainable AI for Unsupervised Machine Learning: A Proposed Scheme Applied to a Case Study with Science Teachers Topics: Adaptive Educational Systems; AI Literacy; Architectures for AI-based Educational Systems; Learning Analytics and Educational Data Mining; Next Generation Teaching and Learning Environments; Pedagogical Agents; Pre-K/K-12 Education; Synchronous and Asynchronous Learning; Theoretical Bases of E-Learning Environments; Universal Design for Learning In Proceedings of the 16th International Conference on Computer Supported Education - Volume 1: CSEDU, 436-444, 2024 , Angers, France