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St. Charles R-VI
St. Charles High

St. Charles R-VI

St. Charles High

St Charles, Missouri

817 students

High School, Grades 9–12

(636)443-4100School Website

817

Students

11.1:1

S:T Ratio

School Snapshot
Key metrics at a glance
Avg ACT Score

20

B-

out of 36
Average
AP Courses

7

B

courses offered
Average
AP Enrollment

23%

C

of students
Good
Student-Teacher Ratio

11:1

A

students per teacher
Excellent
This Week at St. Charles High – June 5, 2026

110 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

Start practicing →
Science

0

students

Start practicing →
Explore practice resources for St. Charles High 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 St. Charles High

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 St. Charles High.

National Tests

June 5, 2026

ACT

Registration deadline

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
+35 more national tests this school year
See the full national test & school calendar
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Practice Hub

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School Details
Address

725 N Kingshighway St, St Charles, MO 63301

Phone

(636)443-4100

Website

Visit Website

District

St. Charles R-VI

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Other Schools in District
St.charles Early Childhood Center
George M. Null Elementary
Blackhurst Elementary
Monroe Elementary
Hardin Middle
Lewis Clark Career Center.