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Cardinal Connection
My TSD Find it Fast Portals
My TSD Fast Links Portal
Find it Fast links page provides access to all of your frequently used sites/portals: Schoology, PowerSchool, SchoolPay, FinalForms, and much more. Bookmark this page to visit us often.
Costello PTO
Learn More About Your PTO
Learn more about how the Costello PTO supports the teachers and students by visiting our webpage.
Portrait of a Learner
TSD Portrait of a Learner
The 6 C's that make up the TSD Portrait of a Learner seek to tie together the mission, vision, and core values of the district.
We are OneTroy
OneTroy: A Culture of Belonging
The goal of OneTroy is cultivate an environment of inclusion in our classrooms and schools, ensuring students feel needed and valued, seen and heard, accepted and embraced, while keeping high expectations for all.
Learn More About Belonging Belonging Video for Young Students
Where YOUR
Journey Leads
This is the moment when it all pays off. Your years here have helped you know who you are, what you want, and how far you want to go. But it’s not only about getting in; it’s about thriving where you are destined to be.
416
Number of Students
1972
Costello was Built in 1972
15
Student to Teacher Ratio is 15:1
A+
Overall School Grade for Diversity, Academics, and Teachers
2024
NICHE #2 Best School District in MI
75
Total Number of Staff
