In this paper, we present a web-based educational setting, referred to as SCALE (Supporting Collaboration and Adaptation in a Learning Environment), which aims to serve learning and assessment. SCALE enables learners to (i) work on individual and collaborative activities proposed by the environment with respect to learners' knowledge level, (ii) participate actively in the assessment process in the context of self-, peer- or collaborative-assessment activities, (iii) work with educational environments, embedded or integrated in SCALE, that facilitate the elaboration of the activities and stimulate learners' active involvement, (iv) use tools that support the synchronous and asynchronous collaboration/communication and promote learners' interaction and reflection, and (v) have access to feedback components tailored to their own preferences. Also, learners have control on the navigation route through the provided activities and feedback components, personalizing in this way the learning process. The results revealed from the formative evaluation of the environment are positive and encouraging regarding the usefulness of the supported capabilities and tools. (Contains 5 figures.)