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Mountain Valley Unified School District
Hayfork High

Mountain Valley Unified School District

Hayfork High

Hayfork, California

86 students

High School, Grades 9–12

(530)628-5261School Website

#243

Best Student:Teacher Ratio in California

86

Students

11.5:1

S:T Ratio

School Snapshot
Key metrics at a glance
Avg SAT Score

1,090

B

out of 1600
Average
AP Courses

2

C+

courses offered
Average
AP Enrollment

12%

C

of students
Average
Student-Teacher Ratio

12:1

A

students per teacher
Excellent
This Week at Hayfork High – August 24, 2026

17 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 Hayfork 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 Hayfork 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 Hayfork High.

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 28, 2026

SAT — National

Registration deadline

September 1, 2026

ACT — National

Late registration deadline

September 1, 2026

SAT — National

Late registration deadline

September 4, 2026

SAT — National

Score release
+75 more national tests this school year

State Assessments

March 1, 2027 – June 30, 2027

CAASPP — Statewide Window

Testing window
CA

School Milestones

October 1, 2026 – October 15, 2026

Private School Affidavit Filing Window

Other
CA
See the full national test & school calendar
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1:1 Tutoring

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Practice Hub

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School Details
Address

231 Oak St., Hayfork, CA 96041

Phone

(530)628-5261

Website

Visit Website

District

Mountain Valley Unified School District

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Other Schools in District
Valley High
Hayfork High
Hayfork Elementary