Diekman Elem School
School pathway
Test scores
IAR + ISA 2024-25 . % Proficient (Levels 4-5)What this means: On the IAR + ISA, Illinois's statewide test, about 28 of every 100 students at this school read and write at grade level and about 18 of 100 do math at grade level. Across all Illinois schools, those numbers are about 51 and 38. Reading and writing scores are up about 10 points since 2023, while math scores are up about 11 points.
BeatsExpectations
Demographically-adjusted score · methodologyWhat this means: About 20% of students here test proficient in math and reading, compared with the roughly 15% typical for Illinois schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among Illinois's top nor bottom 10%.
7-year change
SY 2017-18 vs SY 2024-25About Diekman Elem School
Diekman Elem School is one of the tight-knit K-5 schools in Dolton, Illinois, one of the schools within Dolton SD 149, with 227 students on its rolls from grades pre-K through 5. By comparison, Illinois's public schools average about 381 students each, so Diekman Elem School sits 40% smaller than that benchmark.
Dolton SD 149 runs 8 schools in total, collectively educating 2,192 students. Diekman Elem School is one of those campuses.
For racial and ethnic makeup, Diekman Elem School records that 92% of students identify as Black, making the school strongly Black-majority. Beyond that, the school records 7% Hispanic. The wider county runs roughly 22% Black, putting the school's mix considerably more Black than the area baseline.
Looking at school resources, Staff filings list 12 full-time-equivalent teachers, which works out to roughly 18.9:1 students per teacher. That figure is higher than the state norm's 13.9:1 average. Around 98% of the student body qualifies for free or reduced-price meals, which schools and policymakers use as a rough income-mix signal. Set against Cook County (around 66%), the school's rate is somewhat above typical.
On a demographically-adjusted basis, Diekman Elem School sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 15.0%; this one delivers 20.4%.
Around the school, community-level numbers for Cook County indicate median household earnings sit near $83,498, about 43% of the adult population holds a bachelor's degree or above, and the poverty rate sits near 10%. Diekman Elem School is one of 1406 public schools in Cook County (combined enrollment of about 697,934 students).
Nearest neighbor: Berger-Vandenberg Elem School, around 0.3 miles off. Counting just inside five miles, 8 other public schools cluster around Diekman Elem School. Ranking that nearby cluster on reported proficiency puts Diekman Elem School at 3rd of 9; the average score across the group is 15.6%.
Geographically, the school is in a suburban area.
Five-year trend. Diekman Elem School's enrollment has declined 41% since 2018, when it stood at 382 (now 227). Over the same period, the Black share fell from 97% to 92%. The student-to-teacher ratio loosened from 17.4:1 in 2018 to 18.9:1 today.
On the community side, the feed for Diekman Elem School typically covers fundraisers, lost-and-found posts, and report-card season. Contributors range from current parents to recent graduates and teachers.
Cook County at a glance
View full county profileQuick facts
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