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Because colleges select applicants by aptitude, and elementary schools by proximity.

• Prrometheus 18y ago
  What accounts for the difference here? Why can't K-12 institutions select by aptitude?
  • echair 18y ago
    Because you can't pack enough different institutions within a sufficiently small radius. Parents want 5 year olds to live at home. They're ok with 18 year olds not.
    • Prrometheus 18y ago
      Most people live within range of a few different schools. Why are they all the same?