Mr Tarr said teaching should be rigorous and challenging, but it was "academic snobbery" to say you could only study history bytaking lots of detailed notes.
Then Lanworth knits in observations made at ground level by four pairs of people who travel the back roads of America takingnotes on how far along crops are or how wet or dry the fields might be.
One of its directors, Professor Bob Stone, said the idea was the program would be used by groups of eight children at a time, with two taking the controls and the others making notes and discussing what to do.