Public school / High
Crystal Lake Central High School
Crystal Lake, Illinois
- NCES ID
- 171137001367
- District
- Chsd 155
- School type
- Regular
- Title I
- Not designated
Crystal Lake Central High School is a public high school in Crystal Lake, Illinois, run by Chsd 155. It enrols 1,470 students — the 3939th largest of 4,435 public schools in Illinois.
Reported figures, 2022–2023
The Common Core of Data is a directory collection: it records size and staffing, not achievement. Nothing here says whether a school is good.
Enrollment
1,470
Teachers
87.0
Students per teacher
16.9
Free or reduced-price lunch
35.8%
How these figures are defined
Enrollment
Students reported in the autumn headcount. Size is not quality — it is here because it is the figure every other one has to be read against, and because a school of 90 and a school of 4,000 are not comparable on anything else.
Teachers
Classroom teachers in full-time equivalents, so a half-time teacher counts as 0.5. Non-teaching staff are excluded.
Students per teacher
Enrollment divided by teacher FTE. It is not class size: it counts every teacher against every student, including specialists who never take a full class. A school can have 15 students per teacher and 30 in the room.
Free or reduced-price lunch
Share of students eligible for free or reduced-price meals — the most widely used proxy for concentrated poverty in a school. Districts under community eligibility report all students as eligible, which inflates the figure and makes cross-district comparison unreliable.
Within Chsd 155
Schools in the same district, which is the comparison the data actually supports — a peer group defined by who runs them rather than by whichever names sort nearby.
- 1Cary-Grove Community High School1,494 students
- 2Crystal Lake Central High School1,470 students
- 3Crystal Lake South High School1,301 students
- 4Prairie Ridge High School1,140 students
- Enrollment+263.9%
- Teachers+234.6%
- Students per teacher+23.4%
- Free or reduced-price lunch−33.0%
Where this sits
Sources & licence
Collected by the National Center for Education Statistics. Nothing here is edited, interpolated or estimated.
Provenance
- National Center for Education Statistics
- Common Core of Data — school and district directory