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Archbishop O’Leary Catholic High School
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About
Welcome Back/School Start Up Information
Welcome to O'Leary
Welcome from the Principal
O'Leary Highlight Videos
Open House
Registration Information
Register Today!
O'Leary Program Info Viewbook
School Information
Parent Information
School and Transportation Fees
School Assurance Dashboard
Catholic Faith
Calendar
Contact Us
Programs
Student Life
2026 Spartan Showdown (Feb. 5-7)
Archbishop O'Leary Spartan TV
Citadel Club
Creating Communities of Belonging
Inclusive Communities & Student Conduct Policy
Final and Diploma Exam Schedule
O'Leary Grad 2026
Student and Parent Handbook
O'Leary Morning Update
O'Leary Swag Store
School Resource Officers
Prospective Students
Upgrading Options
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"Viam Veritatis Elegi" - We Will Seek the Truth
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Chief Superintendent Lynnette Anderson's June 2026 Message
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O'Leary Grad 2026
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English & Social CSA Part A Exam Week
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Athletics Awards
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LAST DAY OF CLASSES
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English 30-1 / 2 Part A Diploma
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Asian Heritage Month
Humans of ECSD
Catholic Education Week - May 9-16
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