They are also mixed ability, with educators believing the teachers are well-enough trained to cope with a wider range of ability in their classes.
But human runners haven't changed design: they've benefited from new takes on training and racing surfaces, a larger world population -- which means there is a wider range of ability -- and new competition from groups like East and North Africans, according to Charles Tipton, professor emeritus of physiology at the University of Arizona.
History and geography saw similar patterns, as higher entries led to lower results, "suggesting that the entries now comprise a wider range of abilities," according to the Joint Council on Qualifications.
Professor Chris Husbands, director of the Institute of Education, says that among the 163 grammar schools in England, Rugby already does a better job of admitting a wider range of abilities than many of its peers.
St Alban's Catholic High School, Pontypool, Wales: transform a section of our school library into an e-reading zone to promote literacy and encourage more students, from a wider range of abilities, to enjoy reading.
Children were examined on a wider range of abilities, the paper said – ones already being taught in the county's primary schools, rather than skills that can be mastered through home tutoring – and claimed: "Provisional results indicate that a more diverse selection of pupils passed this test, and headteachers say they feel the change has made a difference".
Mario and Luigi are given a wider range of abilities than in previous Super Mario games, including flying or sliding down slopes.
"The first, of course, is the obvious one – that the examination, whichever form it takes, should be available to a wide range of ability and should not, as has been worried about, marginalise some group of pupils," he told the BBC Radio 4 Today programme.
This wide range of ability levels in a single class made it very difficult to teach, pulling down those students who were able to do the work.
These data suggest that plant biotrophic fungi exhibit a wide range of ability to access plant-synthesized sucrose.
The sequences of these light chains are shown in Fig. 2. We chose these four heavy chain/light chain combinations for expression in CHO cells because previous expression in COS-7 cells had shown that they possessed a wide range of ability to bind dsDNA [ 23].
