PublicGrades 9-12
Roy A. Johnson High School
18400 Clifton Way, Castro Valley, CA 94546-0146(510) 537-3000
Total Students18
Student/Teacher9:1
School Information
Charter SchoolNo
Magnet SchoolNo
Virtual SchoolNo
CountyAlameda
School DistrictCastro Valley Unified School District
Principal / AdminKenneth Kahn(510) 537-3000
Founded1980
Free/Reduced Lunch50% Eligible
Acceptance Rate100%
Student Demographics
White5.6%
Hispanic33.3%
Black5.6%
Asian33.3%
Two Or More22.2%
Gender Distribution
55.6%
44.4%
Male Female
Students per Grade
Grade 1218
School Calendar 2026-2027
July 2026
Academic Schedule • 2026-2027
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Summer Break Ends
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Roy A. Johnson High School
Academic Calendar (2026-2027)
July 2026
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August 2026
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September 2026
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October 2026
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November 2026
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December 2026
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January 2027
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February 2027
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March 2027
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April 2027
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May 2027
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June 2027
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Key Dates & Holidays
Independence Day Observed HolidayJul 3
Summer Break EndsJul 30
First Day of SchoolAug 5
Labor Day HolidaySep 7
Preschool-Grade 5 Early DismissalSep 22
Preschool-Grade 5 No School DaySep 25
Middle School Minimum DaysOct 6
Fall BreakOct 9
Winter Break BeginsDec 21
Winter Break EndsJan 1
Grades 6-12 Work Day (No School Pre-5)Jan 4
Martin Luther King Jr. Birthday HolidayJan 18
President's Day BreakFeb 15
Trimester 2 EndsFeb 25
Teacher Report Card Prep Minimum DaysMar 3
Grades 6-8 Report Card Prep Minimum DaysMar 18
Preschool-Grade 5 Early DismissalMar 24
Spring Break BeginsMar 29
Spring Break ContinuesApr 1
Spring Non-School DayApr 26
Finals / End of Year Minimum DaysMay 26
Last Day of SchoolMay 28
Trimester 3 EndsMay 28
Memorial Day HolidayMay 31
Juneteenth HolidayJun 18
Key Dates & Holidays
2026-2027Community Reviews
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