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[quote=Anonymous][quote=Anonymous]Found this more detailed description of the Denver system, which is designed by the same team and has been described as the model for the DC system:

http://www.aplusdenver.org/_docs/FINAL_TC%20Letter%20to%20Denver%20Community%20Members.pdf

Can't cut and paste properly, but the algorithm steps are described in page 4 of that pdf.  Key things I took away

The lottery is run for each school, based on the ranking of the students of that school.  So all the students who ranked that school #1 are run through the lottery and randomly assigned.  Then the students who ranked it #2 are slotted in below them, etc.

This also helps:

http://media.nola.com/education_impact/photo/diagram-enrollment-041512jpg-aea0b995c0aa929b.jpg

That's the New Orleans system.  It seems to me to imply a lottery for each school individually.

These are all designed according to the so-called "Deferred Acceptance Algorithm", which goes back to 1962.  It's commonly accepted to be the best way to do this sort of thing.

[/quote]

Thanks for this.  The first link is not likely as it doesn't fit with how they have described it.  The New Orleans system seems more possible.

Does anyone know how the algorithm worked with the previous DCPS system only?[/quote]

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