Picture a space station, where self-contained ships plug into a bigger vehicle. The station contains facilities the ships could not hold themselves.
This is the idea behind "schools within schools". Several schools on the same site, sharing facilities but each run as a separate unit.
In its report of the first "schools within schools" projects, a UK charity concludes that these schools report fewer exclusions, a drop in bullying and fights, greater parental involvement, increased staff satisfaction and better relationships between students.
Source: here