Clarkson Secondary School vs St Helen Separate School
A head-to-head comparison of two schools in Ontario, Canada, 457 m apart, using official Canadian 2025 data. The better value in each row is highlighted.
Clarkson Secondary School
Mississauga · Public secondary · Grades 9-12
740 students
St Helen Separate School
Mississauga · Catholic elementary · Grades JK-8
235 students
| Measure | Clarkson Secondary School Mississauga, Ontario | St Helen Separate School Mississauga, Ontario |
|---|---|---|
| Success Index (Canada) | 45 Lower 50% | 65 Top 50% |
| Province rank | #439 of 766 | #1064 of 3,871 |
| National rank | #439 of 766 | #1064 of 3,871 |
| Sector | Public | Catholic |
| Type | Secondary | Elementary |
| Year range | Grades 9-12 | Grades JK-8 |
| Students | 740 | 235 |
| Enrolment | 740 | 235 |
| EQAO Grade 3 | – | 66.7% |
| EQAO Grade 6 | – | 82% |
| EQAO Grade 9 maths | 49% | – |
| OSSLT pass rate | 84% | – |
| Low-income households | 8% | 5% |
| Parents without a credential | 4% | 0% |
| First language not English | 33% | 25% |
| Special education | 15% | 30% |
| Identified as gifted | 0% | 0% |
| FSA literacy score | – | – |
| FSA numeracy score | – | – |
| FSA Grade 4 literacy score | – | – |
| FSA Grade 4 numeracy score | – | – |
| FSA Grade 7 literacy score | – | – |
| FSA Grade 7 numeracy score | – | – |
| city or town | Mississauga | Mississauga |
| province | Ontario | Ontario |
| Website | schools.peelschools.org/sec/clarkson/Pages/default.aspx | www.dpcdsb.org/HELEN |
The verdict
- •St Helen Separate School scores higher on the Success Index (Canada) (65.2 vs 44.7).
- •Clarkson Secondary School is the larger school with 740 students compared with 235.
- •Clarkson Secondary School is a public school while St Helen Separate School is a catholic school, so fees and admission rules differ.
The Success Index (Canada) summarises published results and context from official data. It does not measure teaching quality or fit. Methodology.
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Frequently asked questions
Is Clarkson Secondary School better than St Helen Separate School?
On the Success Index (Canada), St Helen Separate School ranks higher (65.2 vs 44.7 out of 100). The index is built from published results and context data, not from teaching quality or fit, so visit both schools before deciding.
How far apart are Clarkson Secondary School and St Helen Separate School?
About 457 m in a straight line, between Mississauga and Mississauga in Ontario.
Which has the better Enrolment?
Clarkson Secondary School: 740. St Helen Separate School: 235. Students enrolled in the latest published year.
How do Clarkson Secondary School and St Helen Separate School rank in Ontario?
Clarkson Secondary School is 439th of 766 and St Helen Separate School is 1064th of 3,871 among secondary schools in Ontario on the 2025 Success Index (Canada).