Herman E Dummer
School pathway
Test scores
IAR + ISA 2024-25 . % Proficient (Levels 4-5)What this means: On the IAR + ISA, Illinois's statewide test, about 63 of every 100 students at this school read and write at grade level and about 49 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 19 points since 2023, while math scores are up about 17 points.
BeatsExpectations
Demographically-adjusted score · methodologyWhat this means: About 52% of students here test proficient in math and reading, compared with the roughly 43% 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 Herman E Dummer
Herman E Dummer is one of the tight-knit primary schools in Sandwich, Illinois, overseen by Sandwich CUSD 430, with 275 students on its rolls from grades 4 through 5. Compared to the state average of about 381 students per school, that is 28% smaller than typical.
Sandwich CUSD 430 comprises 6 schools with combined enrollment of 1,872 students; Herman E Dummer is among them.
For racial and ethnic makeup, Herman E Dummer shows that White students make up the majority at 78%; the rest comes out to 18% Hispanic, 3% multiracial. That mix tracks the wider county fairly closely.
Looking at school resources, On paper, Herman E Dummer has 19 full-time-equivalent teachers, translating to a class-load average of around 14.8:1. Statewide, the average ratio sits near 13.9:1, putting Herman E Dummer higher than the state norm the norm. About 49% of enrolled students meet the income threshold for free or reduced-price lunch, which schools and policymakers use as a rough income-mix signal.
With demographic context factored in, Herman E Dummer tracks the demographic baseline. The model predicts 43.2% given the school's FRL share; actual proficiency is 51.7%.
In the surrounding community, the surrounding county (DeKalb County) reports that the typical household earns roughly $70,724 per year, 33% of adults hold a bachelor's degree or higher, and the poverty rate sits near 10%. Across DeKalb County's 43 public schools (combined enrollment of about 16,328 students), Herman E Dummer is one campus in the mix.
The closest other public school is Sandwich Middle School, roughly 0.1 miles away. Within five miles, there are 8 other public schools. Ranking that nearby cluster on reported proficiency puts Herman E Dummer at 5th of 9; the average score across the group is 54.5%.
The campus sits in an outer-ring setting.
Looking at the recent track record. Looking back 7 years, enrollment at Herman E Dummer has edged up 6%, going from 259 students in 2018 to 275 in 2025. The student-to-teacher ratio loosened from 11.3:1 in 2018 to 14.8:1 today.
On allk12, recent activity here tends to focus on open house dates, ride-share offers, and field-trip permission slips. Anyone with firsthand experience at this school can post or comment.
DeKalb County at a glance
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