Riverdale Ridge High School

Grades 9–12 Public District: School District 27J

13380 Yosemite Street, Thornton, CO 80602 Map

Math (met standard)
24%
−13 state 37% · 2025-26
English (met standard)
53%
−11 state 63% · 2025-26
Science (met standard)
21%
−3 state 25% · 2025-26
Low income
39%
free or reduced-price lunch
Special education
9%
students with an IEP · 2023-24
Students
1,784
2024-25
Students per teacher
21.7
2024-25

Test score trends

Share of students who met or exceeded the state standard each year.

Latest results by grade

Grade Math English Science
Grade 9 29% state 41% · 2025-26 54% state 66% · 2025-26 —
Grade 10 26% state 39% · 2025-26 50% state 65% · 2025-26 —
Grade 11 18% state 32% · 2025-26 53% state 60% · 2025-26 21% state 25% · 2025-26
All grades 24% state 37% · 2025-26 53% state 63% · 2025-26 21% state 25% · 2025-26
Results by year (all grades)
School year Math English Science
2025-26 24% state 37% 53% state 63% 21% state 25%
2024-25 21% state 35% 56% state 64% 16% state 25%
2023-24 22% state 35% 59% state 63% —
2022-23 30% state 40% 58% state 62% —
2021-22 25% state 39% 57% state 63% —
2018-19 38% state 46% 62% state 66% —

Compared with similar schools

Colorado high schools where 2–12% of students come from families below the poverty line (this school: 7%)

Similar schools nearby with higher scores

Family income strongly affects test scores, so comparing a school with others that serve families like its own is fairer than comparing it with the state average. The share of students below the poverty line is an estimate by the Urban Institute for 2022-23, made the same way in every state; it is a stricter measure than the low-income share above (free or reduced-price lunch, which goes up to 185% of the poverty line), so it is lower. “Typical” is the median: half of the similar schools score higher, half lower.

Graduation & college

4-year graduation rate
94%
state 86% · 2024-25

Graduation rate: students who earned a regular diploma within four years.

Students

Race and ethnicity, 2024-25

Students with disabilities: 9% of students (144) receive special education under an IEP (individualized education program), 2023-24; another 7% have only a Section 504 plan (support such as extra time or seating, without special education), 2023-24. Source: U.S. Department of Education, Civil Rights Data Collection.

Year-by-year history is loaded from the NCES Common Core of Data (2017-18 onward).

Nearby schools

Subject percentages show the share of students who met or exceeded the state standard.

Pick to compare
Horizon High School
Grades 9–12 · Adams 12 Five Star Schools
2.3 mi
49%
+12 vs state
72%
+8 vs state
— Average of math, English and science: 62% in 2022-23 → 60% in 2025-26 33% 1,966 White 53%
Prairie View High School
Grades 9–12 · School District 27J
2.8 mi
17%
−20 vs state
47%
−17 vs state
13%
−12 vs state
4% Average of math, English and science: 36% in 2022-23 → 32% in 2025-26 54% 1,809 Hispanic 58%
Brighton High School
Grades 9–12 · School District 27J
4.7 mi
17%
−21 vs state
44%
−20 vs state
16%
−9 vs state · 2024-25
7% Average of math, English and science: 37% in 2022-23 → 30% in 2025-26 56% 1,733 Hispanic 59%
Innovations & Options
Grades 6–12 Alternative · School District 27J
4.9 mi —
19%
−42 vs state · 2018-19
— Not enough years of data — 235 Hispanic 71%