Percentage of students scoring proficient or higher
2014 2015 2016 2017 2018 N 313 273 335 302 344 # 312 271 328 294 340 Winchester % 100% 99% 98% 97% 98% N           #           Select a Comparable District %           N 70,465 69,751 69,938 70,268 70,532 # 63,214 63,701 63,901 63,887 63,833 State % 89% 91% 92% 91% 91%		2014 2015 2016 2017 2018 N 314 273 337 302 345 # 310 268 312 288 332 Winchester % 98% 98% 93% 96% 96% N           #           Select a Comparable District %           N 70,607 69,766 69,954 70,340 70,187 # 55,436 54,851 54,359 55,415 54,500 State % 78% 78% 78% 79% 78%		2014 2015 2016 2017 2018 N 309 268 323 289 340 # 294 252 297 270 323 Winchester % 95% 94% 92% 93% 95% N           #           Select a Comparable District %           N 68,495 67,732 67,941 68,063 67,875 # 48,613 48,530 49,868 50,590 50,532 State % 71% 71% 73% 74% 75%
Composite Performance Index (CPI)
2014 2015 2016 2017 2018 N 313 273 335 302 344 # 312 271 328 294 340 Winchester CPI 99.90 99.90 99.70 99 99.70 N           #           Select a Comparable District CPI           N 70,465 69,751 69,938 70,268 70,532 # 63,214 63,701 63,901 63,887 63,833 State CPI 96 96.70 96.70 96.50 96.20		2014 2015 2016 2017 2018 N 314 273 337 302 345 # 310 268 312 288 332 Winchester CPI 99.50 99.60 97.40 98.40 98.60 N           #           Select a Comparable District CPI           N 70,607 69,766 69,954 70,340 70,187 # 55,436 54,851 54,359 55,415 54,500 State CPI 90 89.90 89.70 89.90 89.50		2014 2015 2016 2017 2018 N 309 268 323 289 340 # 294 252 297 270 323 Winchester CPI 98.50 97.80 97.30 98 98.50 N           #           Select a Comparable District CPI           N 68,495 67,732 67,941 68,063 67,875 # 48,613 48,530 49,868 50,590 50,532 State CPI 87.90 88.20 88.90 89.40 89.30
Median student growth percentiles (SGP) (2014 - 2017)
2014 2015 2016 2017 N 295 265 308 269 Winchester SGP 65.0 67.0 62.0 67.0 N         Select a Comparable District SGP N 61,694 61,218 60,642 60,857 State SGP 50.0 51.0 50.0 50.0		2014 2015 2016 2017 N 294 265 312 269 Winchester SGP 66.0 64.0 60.0 69.0 N         Select a Comparable District SGP N 61,969 61,548 60,820 60,553 State SGP 50.0 50.0 50.0 50.0
Average student growth percentiles (SGP) (2018)
2018 N 314 Winchester SGP 66.3 N   Select a Comparable District SGP N 61,055 State SGP 49.9		2018 N 317 Winchester SGP 63.5 N   Select a Comparable District SGP N 60,804 State SGP 49.9
Percentage of students averaging 2 or above on open response items
2014 2015 2016 2017 2018 N 313 271 331 299 341 # 302 268 317 288 329 Winchester % 96% 99% 96% 96% 96% N           #           Select a Comparable District %           N 69,602 68,882 69,027 69,366 69,660 # 57,985 59,820 57,875 59,445 57,706 State % 83% 87% 84% 86% 83%		2014 2015 2016 2017 2018 N 314 271 334 299 342 # 302 236 283 272 317 Winchester % 96% 87% 85% 91% 93% N           #           Select a Comparable District %           N 69,736 68,887 69,032 69,430 69,305 # 50,147 45,240 45,508 46,783 45,707 State % 72% 66% 66% 67% 66%		2014 2015 2016 2017 2018 N           #           Winchester % N           #           Select a Comparable District %           N           #           State %