Diversity of supply in schools concentrates minds on what kind of teaching is best, particularly in challenging places.
Until recently, the vast number of Chinese education agencies that broker students' entry to American colleges and private high schools concentrated on preparing them at home in China.
These schools concentrated on the teaching and memorization of the Qurʾān; some were little more than gathering places beneath a tree where teachers held classes.
Others argue that high-stakes testing distorts the curriculum as schools concentrate on results to boost their position in the league tables.
Results showed that the bank played an important role in influencing fish distribution and behaviour, with shallow pelagic schools concentrated over the bank and closer to the surface at times of high internal wave activity.
Instead of trying to solve this problem together, high schools and colleges typically operate in silos — high schools concentrate on increasing graduation rates, while universities pay little attention to what's happening in the local public schools.
The list of schools, compiled over the winter break by the Department of Education, the Police Department and the teachers' and principals' unions, includes 10 high schools and two middle schools, concentrated in Brooklyn and the Bronx.
The sit-in, which lasted 42 days, sparked national attention and highlighted, among other things, the lack of libraries in CPS schools concentrated in high-poverty areas on the city's South and West Sides.
By the 1990s, there were many more private schools concentrated in the southern peninsula and the better performing northern provinces.
The lower secondary schools concentrated mostly on activating the recesses, and future challenges also lie in the activation of lessons and reducing sedentary behaviour within the school days.
By comparison, Scratch is proudly old-school, concentrating on the nuts and bolts of vinyl manipulation.
