Summary
Thornton School is an elementary school in Johnston, Rhode Island, serving 340 students in grades 1–5. SchoolDigger ranks it 106th of 163 statewide, at the 35th percentile and with 2 stars. In 2025–26, 24% of students were proficient in English language arts (ELA), 30% in math and 28% in science. The most important takeaway is that Thornton ranks third among 11 nearby schools in all three subjects, yet remains below the state in each.
Compared with nearby schools, Thornton’s results are above average: the group averages are 19% in ELA and 19% in math, and Thornton ranks third in both subjects and science. It is ahead of eight of the 10 nearby schools in each subject; only Stone Hill School and Stadium School score higher in all three. Still, Thornton trails the state by 9 percentage points in ELA, 2 in math and 4 in science. Compared with Johnston, Thornton is 3 points lower in ELA but 10 points higher in math and 11 points higher in science. Third-grade results are a bright spot, while fourth-grade ELA is a relative weakness: 15% of fourth-graders were proficient, compared with 32% statewide.
Math has improved steadily, rising from 19% proficiency in 2022–23 to 30% in 2025–26, while ELA fell from 33% to 24%; science was roughly flat, moving from 27% to 28%. Thornton’s student–teacher ratio was 10.9, the lowest among the 11 nearby schools, and its free/reduced-lunch rate was 69%, below the group average of 76%. These figures provide context but do not explain test results. SchoolDigger’s student-group rankings show notable differences: its effectiveness ranking for African American students was at the 93rd percentile (3rd of 43), while its ranking for students receiving special education services was at the 15th percentile, down 31 percentile points from the prior year.
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