A well explained list of learning content design hints from one of the best in the business. It is stuff most of us know already but we don't always remember to apply it (well - I don't!) - this is a good reminder

The focus is unashamedly entirely on information transmission and retention, I suspect because that tends to be the easiest thing for psychologists to research as well as reflecting Donald's background in the industry, and this is very much about traditional paper or computer screen design that is not transferable to all contexts (pull-outs, for instance, are generally a dumb idea on mobile phones), but it's still useful and well-grounded info.