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
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.
Transition to Kindergarten Session
Families of students with special education needs are invited to attend a virtual information session about the transition to Kindergarten.
Welcome to Kindergarten!
Do you have a child born in 2022? Registration for the 2026-2027 school year is now open!
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