PublicGrades 9-12
Imperial Ave. Holbrook High School
322 North Imperial Avenue, Imperial, CA 92251-1267(760) 355-3207
Total Students28
Student/Teacher11.11:1
Reading Prof.27.27%
Graduation Rate60%
School Information
Charter SchoolNo
Magnet SchoolNo
Virtual SchoolNo
CountyImperial
School DistrictImperial Unified School District
Principal / AdminCynthia Herrera(760) 355-3207
Founded1980
Free/Reduced Lunch60.71% Eligible
Acceptance Rate100%
Student Demographics
White10.7%
Hispanic89.3%
Gender Distribution
60.7%
39.3%
Male Female
Students per Grade
Grade 106
Grade 115
Grade 1217
School Calendar 2026-2027
August 2026
Academic Schedule • 2026-2027
Holiday Event
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New Teacher Training
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Teacher Training Days
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Teacher Training Days
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Orientation Day for all Staff
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First Day of School - Mini DayKindergarten Assessments - Early Dismissal
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Kindergarten Assessments - Early Dismissal
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Kindergarten Assessments - Early Dismissal
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Kindergarten Assessments - Early Dismissal
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Kindergarten Assessments - Early Dismissal
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Imperial Ave. Holbrook High School
Academic Calendar (2026-2027)
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August 2026
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September 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
New Teacher TrainingAug 11
Teacher Training DaysAug 12
Orientation Day for all StaffAug 14
First Day of School - Mini DayAug 17
Kindergarten Assessments - Early DismissalAug 17
Labor Day ObservanceSep 7
First Quarter EndsOct 16
TK-5 Parent Conference Week - Early DismissalOct 26
Veterans DayNov 11
Thanksgiving RecessNov 23
Kindergarten Assessments - Early DismissalDec 7
Semester Ends / Minimum DayDec 17
Winter Break StartsDec 21
Winter Break EndsJan 4
School ResumesJan 5
Martin Luther King Jr. Day ObservanceJan 18
Lincoln's Birthday ObservanceFeb 12
Washington's Birthday ObservanceFeb 15
Kindergarten Assessments - Early DismissalMar 1
Third Quarter EndsMar 12
Good FridayMar 26
Spring Break StartsMar 29
Spring Break EndsApr 2
School ResumesApr 5
Kindergarten Assessments - Early DismissalMay 10
Memorial Day ObservanceMay 31
Last Day of SchoolJun 3
Juneteenth ObservanceJun 19
Key Dates & Holidays
2026-2027Community Reviews
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