EPSB · Senior High
Chinese (Mandarin) BilingualInternational Baccalaureate CertificateInternational Baccalaureate DiplomaLillian Osborne
10-12 · 15312 23 Avenue Edmonton, AB T6R 0R8
The methodology
The data behind this score
The Roost Rating weights AEAM above PAT, plus Roost field research, capped at 95. A missing source has its weight shared across the ones that remain, never counted as a zero.
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Classes and enrolment
Typical class size
- Grades 10 to 12
- 34Typical for these grades across EPSB schools: 31from 223 classesNot counted above: 7 classes with fewer than 10 students (Alberta does not publish their sizes).
Each figure is the middle class size in those grades for 2025/26, among the classes whose sizes are published. A class is one teacher with one group of students, so a group with several teachers counts once per teacher, and in junior and senior high each course section counts. The EPSB figure is the middle of every EPSB school's own figure for those grades, across Alberta's release.
Students enrolled
1,961 students in 2025/26 (preliminary)
Students enrolled each school year, 2016/17 to 2025/26
- 2016/17: 1,209 students
- 2017/18: 1,384 students
- 2018/19: 1,581 students
- 2019/20: 1,866 students
- 2020/21: 1,973 students
- 2021/22: 2,113 students
- 2022/23: 2,006 students
- 2023/24: 1,982 students
- 2024/25: 1,945 students
- 2025/26: 1,961 students
Enrolment moves with boundary changes, new schools nearby, the grades a school offers and how many children live close by. Most schools here had fewer students in 2020/21, the first school year of the pandemic.
Context only: these describe the school's situation, not how well it teaches, and neither is part of the Roost Rating.
Contains information licensed under the Open Government Licence – Alberta. Source: Alberta Education and Childcare.
Class sizes as of Nov 24, 2025Enrolment 2025/26 is preliminary: Alberta replaces it with final figures later.About these figures
Enrolment
How enrolment works
- Grades
- 10-12
- Programs
- Chinese (Mandarin) Bilingual · International Baccalaureate Certificate · International Baccalaureate Diploma
- Address
- 15312 23 Avenue Edmonton, AB T6R 0R8
EPSB schools are assigned by home address. Lillian Osborne is the designated senior high only if your address falls inside its catchment — confirm yours with an address lookup. Alternative programs are programs of choice — you apply directly to a school that offers them, and spaces can be limited; they are not guaranteed by address. Registration details: see Edmonton Public Schools →
Register through Edmonton Public Schools.
Where Lillian Osborne is
15312 23 Avenue Edmonton, AB T6R 0R8
Your catchment boundary is set by your home address, not the school’s location — look up your address to confirm zoning.