Update: Due to the transition to a new state assessment in 2014-15, new school segmentation levels will not be produced this year. The 2013-14 segmentation levels can be accessed below and 2015-16 segmentation levels will be posted by first quarter of 2017.
Seattle Public Schools produces annual segmentation reports based on school data from the previous school years. The purpose of segmentation is to monitor school progress toward meeting district-wide strategic targets. Segmentation results are used to customize levels of support and autonomy for schools based on performance and need.
The most recent district summary report for school segmentation levels can be accessed here.