: This paper deals with the use of learning styles in technology-enhanced learning, by introducing a so-called "Unified Learning Style Model" (ULSM). The article aims at providing answers to three main questions: "What is ULSM?", "Why do we need it?" and "How can we use it?". First, a critical analysis regarding learning styles is provided; the identified challenges are addressed by proposing the use of a new model, specifically designed for TEL use. This model integrates learning preferences extracted from several traditional learning style models, related to perception modality, way of processing and organizing information, as well as motivational and social aspects. A detailed description of the ULSM components is provided, together with its rationale and its advantages. The practical applicability of the model is also shown by briefly introducing an adaptive webbased educational system based on it (called WELSA).