ANTONIO FERNOS ISERN

Located at CARR 181 KM 32.5 BO QUEBRADA, in SAN LORENZO, Puerto Rico, ANTONIO FERNOS ISERN is a large four-year high school that enrolls 673 students (grades 9 through 12), run under PUERTO RICO DEPARTMENT OF EDUCATION. That puts it 73% larger than the typical public school in Puerto Rico, which averages around 389 students.

ANTONIO FERNOS ISERN is one of 856 schools operated by PUERTO RICO DEPARTMENT OF EDUCATION, a district that teaches 236,079 students overall.

Demographically, ANTONIO FERNOS ISERN reports that nearly all students (100%) are Hispanic. That mix tracks the wider county fairly closely.

Looking at the economic backdrop, The school reports having 48 full-time-equivalent teachers, for a student-teacher ratio near 14.0:1. Statewide, the average ratio sits near 10.2:1, putting ANTONIO FERNOS ISERN higher than the state norm the norm. Roughly 91% of students at ANTONIO FERNOS ISERN qualify for free or reduced-price lunch, a commonly cited indicator of low-income enrollment.

Around the school, San Lorenzo Municipio reports that median household earnings sit near $22,847 and the poverty rate sits near 41%. Across San Lorenzo Municipio's 8 public schools (combined enrollment of about 2,880 students), ANTONIO FERNOS ISERN is one campus in the mix.

Nearest neighbor: GENEROSO MORALES MUNOZ, around 0.6 miles off. 8 of the 8 nearest public schools sit inside a five-mile radius.

ANTONIO FERNOS ISERN operates from a residential location.

Five-year trend. Looking back 7 years, enrollment at ANTONIO FERNOS ISERN has grew 14%, going from 588 students in 2018 to 673 in 2025. Class-load math has fell: from 15.5:1 in 2018 to 14.0:1 in 2025.

In the discussion threads here, recent activity here tends to focus on fundraisers, lost-and-found posts, and report-card season. Anyone with firsthand experience at this school can post or comment.