Here are 10 read-oniy previews of facets of SPT that illustrate some of the approaches that are interesting. Each one is a single learning object , and so is extracted from its surroundings, and so you’ll have to use some some imagination to see why it is as it is.
They’re intended as trailers – not a substitute for the real thing. But unlike (some) movie trailers all the best bits are not here. For that you’ll need to download the particular resource.