Illinois Enrollment Diagnostic Plots

Overview

This report validates the ilschooldata package by examining enrollment trends for 10 representative Illinois school districts. Districts were selected to represent:

Urban: Chicago, East St. Louis
Suburban: Evanston, Naperville
Mid-size: Springfield, Champaign
Small/Rural: Cairo (the gang!), Galena, Payson
Charter-heavy: Chicago (included above)

State Enrollment Trend

Key observations: - Peak enrollment around 2.08M in 2007 - Gradual decline to ~1.85M by 2025 (-11% from peak) - Sharp drop during COVID (2020-2021)

District Time Series

Payson

Cairo

Galena

Champaign

Evanston CCSD 65

Naperville

East St Louis

Rockford

Chicago

Springfield

Data Quality Summary

Data availability and enrollment ranges
District	Years	From	To	Min Enr	Max Enr
Chicago	13	2,012	2,025	319,769	400,931
Rockford	13	2,012	2,025	26,089	28,679
Naperville	26	1,999	2,025	15,899	19,020
Springfield	13	2,012	2,025	12,795	15,048
Champaign	26	1,999	2,025	8,824	10,465
Evanston CCSD 65	26	1,999	2,025	6,047	7,959
East St Louis	14	2,008	2,025	4,536	6,820
Cairo	26	1,999	2,025	271	959
Galena	26	1,999	2,025	809	914
Payson	26	1,999	2,025	439	700

Cairo Gang Deep Dive

Generated by ilschooldata package diagnostic script

Session Info

## R version 4.5.2 (2025-10-31)
## Platform: x86_64-pc-linux-gnu
## Running under: Ubuntu 24.04.3 LTS
## 
## Matrix products: default
## BLAS:   /usr/lib/x86_64-linux-gnu/openblas-pthread/libblas.so.3 
## LAPACK: /usr/lib/x86_64-linux-gnu/openblas-pthread/libopenblasp-r0.3.26.so;  LAPACK version 3.12.0
## 
## locale:
##  [1] LC_CTYPE=C.UTF-8       LC_NUMERIC=C           LC_TIME=C.UTF-8       
##  [4] LC_COLLATE=C.UTF-8     LC_MONETARY=C.UTF-8    LC_MESSAGES=C.UTF-8   
##  [7] LC_PAPER=C.UTF-8       LC_NAME=C              LC_ADDRESS=C          
## [10] LC_TELEPHONE=C         LC_MEASUREMENT=C.UTF-8 LC_IDENTIFICATION=C   
## 
## time zone: UTC
## tzcode source: system (glibc)
## 
## attached base packages:
## [1] stats     graphics  grDevices utils     datasets  methods   base     
## 
## other attached packages:
## [1] scales_1.4.0       ggplot2_4.0.2      dplyr_1.2.0        ilschooldata_0.1.0
## 
## loaded via a namespace (and not attached):
##  [1] rappdirs_0.3.4     sass_0.4.10        generics_0.1.4     hms_1.1.4         
##  [5] digest_0.6.39      magrittr_2.0.4     evaluate_1.0.5     grid_4.5.2        
##  [9] RColorBrewer_1.1-3 fastmap_1.2.0      cellranger_1.1.0   jsonlite_2.0.0    
## [13] purrr_1.2.1        codetools_0.2-20   textshaping_1.0.5  jquerylib_0.1.4   
## [17] cli_3.6.5          rlang_1.1.7        crayon_1.5.3       bit64_4.6.0-1     
## [21] withr_3.0.2        cachem_1.1.0       yaml_2.3.12        tools_4.5.2       
## [25] downloader_0.4.1   parallel_4.5.2     tzdb_0.5.0         vctrs_0.7.1       
## [29] R6_2.6.1           lifecycle_1.0.5    fs_1.6.7           bit_4.6.0         
## [33] vroom_1.7.0        ragg_1.5.1         pkgconfig_2.0.3    desc_1.4.3        
## [37] pkgdown_2.2.0      pillar_1.11.1      bslib_0.10.0       gtable_0.3.6      
## [41] glue_1.8.0         systemfonts_1.3.2  xfun_0.56          tibble_3.3.1      
## [45] tidyselect_1.2.1   knitr_1.51         farver_2.1.2       htmltools_0.5.9   
## [49] labeling_0.4.3     rmarkdown_2.30     readr_2.2.0        compiler_4.5.2    
## [53] S7_0.2.1           readxl_1.4.5

10 Representative Districts Time Series

2026-03-11