February 25: All Bus Transportation Cancelled
All bus transportation is cancelled. All schools remain open.
Archbishop O’ Sullivan Catholic School Home
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We strive to provide a distinctively Catholic education that allows each child the opportunities and experiences to grow in their academic capacity and faith formation. Within these experiences we focus on high expectations for all learners that are rooted in our Gospel teachings.
School News
School Board News
February 25: All Bus Transportation Cancelled
All bus transportation is cancelled. All schools remain open.
2026-2027 School Year Calendar Pending Ministry Approval
On February 24th, the Board of Trustees approved the proposed School Year Calendar. This calendar is now pending approval by the Ministry of Education. Families and staff will be notified when this approval is final.
Season of Lent
During Lent, the Church calls us to participate in the three pillars of prayer, fasting, and almsgiving.
Letter to Families - February 11th
The Director of Education shared a letter to all ALCDSB families on February 11th, following the tragedy in British Columbia.
Are you a Catholic ratepayer?
Direct your tax support to the ALCDSB.
Math Makers Program - Grade 7 & 8 Students
The Grade 7 - 8 Math Makers Program is designed to provide additional support and enrichment for your child’s mathematical learning.
ALCDSB Welcomes New Director of Education
The Algonquin and Lakeshore Catholic District School Board welcomes Carey Smith-Dewey as the new Director of Education.
2026-2027 School Year Calendar Survey
Your input matters.
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