Successive lessons for origami and paper engineering first give students cognitive tools, primarily focused on interpreting 2D diagrams of 3D information, and then ask them to enact their newly found understanding through exploration and experimentation.
When we have two successive lessons practising the same skill (e.g. a golf swing), it makes some sense that the system should view them as a single continuous process of skill acquisition rather than two separate memories.
That's the lesson of successive economic cycles, from the 1920s boom that brought a frenzy of land development in and around Miami Beach it turned to bust, but left a lasting legacy.
Seventy-five and more years later, after the collapse of Lehman Brothers triggered a financial meltdown and deep recession, successive American administrations learned important lessons from Roosevelt, which helped the United States and the world avoid another Great Depression.
The backlog caused by rain has prompted organisers to put back the men's final to Monday for the fourth successive year, and Federer believes lessons should be learned.
He comes up with a tale, often said to be modelled on the story of the castaway Alexander Selkirk, that, like Bunyan's, follows an almost biblical pattern of transgression (youthful rebellion), retribution (successive shipwrecks), repentance (the painful lessons of isolation) and finally redemption (Crusoe's return home).
I take pieces and lessons from each successive project and add them to the next".
However throughout the years the medical profession has endured, and skills have been passed down to successive generations; so are there any lessons to be learnt from our past?
Emory envisions the summer course as a five-year program with lessons becoming more advanced in successive years for the returning students.
It was a lesson learned in Greece, where despite successive European bailouts, about a third of deposits have been withdrawn from its banks since 2009, as the public worried that Athens might have to return to the drachma.
