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School District 27J
Riverdale Ridge High School

School District 27J

Riverdale Ridge High School

Thornton, Colorado

1,463 students

High School, Grades 9–12

(303)655-6800School Website

1,463

Students

24.2:1

S:T Ratio

School Snapshot
Key metrics at a glance
Avg SAT Score

1,090

B

out of 1600
Average
Avg ACT Score

21

B

out of 36
Average
AP Courses

12

A-

courses offered
Good
AP Enrollment

26%

C

of students
Good
Student-Teacher Ratio

24:1

C+

students per teacher
Below Avg
Graduation Rate

88%

A

Excellent
This Week at Riverdale Ridge – June 6, 2026

201 students practicing on Varsity Tutors

SAT Prep

1

A

B

C

D

2

A

B

C

D

3

A

B

C

D

4

A

B

C

D

5

A

B

C

D

1520

0

students

Start practicing →
ACT Prep

36

ENG

MATH

READ

SCI

0

students

Start practicing →
Math

0

students

Start practicing →
English

0

students

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Science

0

students

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Explore practice resources for Riverdale Ridge students
Academic Grades

Select a grade level to explore courses and resources

9
Grade
10
Grade
11
Grade
12
Grade
Academic Resources

Typical courses and practice resources for students at Riverdale Ridge High School

Biology
9

Cell biology, genetics, evolution, and ecology

AP Biology
AP

College-level biology with lab component

Chemistry
9

Atomic structure, reactions, and stoichiometry

AP Chemistry
AP

College-level chemistry with lab component

Physics
9

Mechanics, waves, electricity, and magnetism

AP Physics 1
AP

Algebra-based mechanics and waves

Environmental Science
9

Ecosystems, human impact, and sustainability

AP Environmental Science
AP

College-level environmental science

World History
9

Global civilizations from ancient to modern times

AP World History
AP

College-level world history analysis

U.S. History
9

American history from colonization to present

AP U.S. History
AP

College-level American history

Standardized Test Dates

Upcoming national, state, and school calendar dates that affect students at Riverdale Ridge High School.

National Tests

June 6, 2026

SAT — National

Test date

June 8, 2026

ACT Photo Upload/Standby Deadline

Photo upload deadline

June 13, 2026

ACT — National

Test date

June 20, 2026 – July 4, 2026

SAT Score Release Date

Score release

June 23, 2026

ACT

Score release

June 24, 2026

ACT

Late registration deadline
+34 more national tests this school year
See the full national test & school calendar
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ACT Prep

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1:1 Tutoring

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Practice Hub

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School Details
Address

13380 Yosemite Street, Thornton, CO 80602

Phone

(303)655-6800

Website

Visit Website

District

School District 27J

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