BBC BiteSize: http://www.bbc.co.uk/education
BBC BiteSize has small, useful clips and info about curriculum topics. There’s quite wide coverage, but the clips are quite short. This is a useful top-up to other learning, not an education programme by itself. Also, some of the clips can feel a little patronizing. But overall, this has great visualisation tools to help with learning, and it’s very useful to visit if you’re already talking about a topic, but you can’t quite explain with pen and paper.
Could fit with either structured or unstructured learning approaches, but might seem to be ‘talking down’ to competent self-directed learners. Or they might like it, try it and see. 🙂