Ruth O. Harris Middle
#219
Best Student:Teacher Ratio in California
568
Students
18.2:1
S:T Ratio
School Snapshot
Key metrics at a glanceStudent-Teacher Ratiostudents per teacher
18:1
B-
Average
Graduation Rate
86%
A
Excellent
This Week at Ruth O. Harris Middle – April 9, 2026
78 students practicing on Varsity Tutors
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School Details
Address
11150 Alder Ave., Bloomington, CA 92316
Phone
(909)580-5020
District
Colton Joint Unified School District
Academic Calendar
2025-2026
Important dates, holidays, and school events