Louis E Dieruff High School

Allentown City School District

Allentown, Pennsylvania

1,915 students

High School, Grades 9–12

(484)765-5501 School Website

1,915

Students

18:1

S:T Ratio

School Snapshot

Key metrics at a glance

Avg SAT Score

884

C+

out of 1600

Below Avg

AP Courses

B+

courses offered

Good

AP Enrollment

of students

Below Avg

Student-Teacher Ratio

18:1

students per teacher

Average

This Week at Louis E Dieruff – August 18, 2026

252 students practicing on Varsity Tutors

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ACT Prep

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MATH

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Academic Grades

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Academic Resources

Typical courses and practice resources for students at Louis E Dieruff High School

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 Louis E Dieruff High School.

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

State Assessments

December 7, 2026 – December 18, 2026

Keystone Exams — Algebra I

Testing window

December 7, 2026 – December 18, 2026

Keystone Exams — Literature

Testing window

December 7, 2026 – December 18, 2026

Keystone Exams — Biology

Testing window

January 4, 2027 – January 15, 2027

Keystone Exams — Algebra I

Testing window

January 4, 2027 – January 15, 2027

Keystone Exams — Literature

Testing window

January 4, 2027 – January 15, 2027

Keystone Exams — Biology

Testing window

+5 more state assessments this school year

See the full national test & school calendar

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School Details

Address

815 N Irving St, Allentown, PA 18109

Phone

(484)765-5501

Website

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District

Allentown City School District

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Other Schools in District

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Jackson Early Childhood Center

Building 21 Allentown

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