2026-2027 School Year Calendar
Important dates to note for the upcoming school year.
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.
News & Announcements
See Me in ALCDSB: Preliminary Report
At the ALCDSB, we are called to listen deeply and learn from the stories and lived experiences of all students in our Catholic schools. This work reflects our shared commitment to fostering equity, dignity, and belonging for all.
CEO/Director of Education June Update
Carey Smith-Dewey, Chief Executive Officer/Director of Education shares her June update.
ALCDSB family takes home $42,912.50!
The Spring 50/50 Raffle has come to a close and one lucky family has won!
Letter to students & families - from Minister Calanda
Please read a written message from Minister of Education, Paul Calandra
Report Card Update
Paper copies will be provided to students for the June reporting period. These will be provided in paper copy in addition to electronic versions.
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