Classen High School of Advanced Studies

Oklahoma City Public Schools

Oklahoma City, Oklahoma

743 students

High School, Grades 9–12

(405)587-5400 School Website

Best ACT in Oklahoma High Schools

743

Students

15.9:1

S:T Ratio

School Snapshot

Key metrics at a glance

Avg ACT Score

A-

out of 36

Good

AP Courses

courses offered

Excellent

AP Enrollment

38%

C+

of students

Excellent

Student-Teacher Ratio

16:1

B+

students per teacher

Good

This Week at Classen High School of Advanced Studies – August 19, 2026

95 students practicing on Varsity Tutors

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Academic Grades

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Academic Resources

Typical courses and practice resources for students at Classen High School of Advanced Studies

Biology

Cell biology, genetics, evolution, and ecology

AP Biology

College-level biology with lab component

Chemistry

Atomic structure, reactions, and stoichiometry

AP Chemistry

College-level chemistry with lab component

Physics

Mechanics, waves, electricity, and magnetism

AP Physics 1

Algebra-based mechanics and waves

Environmental Science

Ecosystems, human impact, and sustainability

AP Environmental Science

College-level environmental science

World History

Global civilizations from ancient to modern times

AP World History

College-level world history analysis

U.S. History

American history from colonization to present

AP U.S. History

College-level American history

Standardized Test Dates

Upcoming national, state, and school calendar dates that affect students at Classen High School of Advanced Studies.

National Tests

August 1, 2026 – November 30, 2026

ISEE — Fall Testing Season

Testing window

August 3, 2026 – June 30, 2027

SSAT — Flex Testing

Testing window

August 22, 2026

SAT — National

Test date

August 28, 2026

SAT — National

Registration deadline

September 1, 2026

ACT — National

Late registration deadline

September 1, 2026

SAT — National

Late registration deadline

+76 more national tests this school year

See the full national test & school calendar

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School Details

Address

1901 North Ellison Avenue, Oklahoma City, OK 73106

Phone

(405)587-5400

Website

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District

Oklahoma City Public Schools

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