J. Addison School

J. Addison School is a private day and boarding school in Markham, Ontario, Canada.

Primary and Secondary Education

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Headquarters: Markham, Ontario, CanadaSource: RevenueBaseRetrieved October 13, 2026
Employee range: 51 to 200Source: RevenueBaseRetrieved October 13, 2026
Founded: 2002Source: RevenueBaseRetrieved October 13, 2026
Published list appearances: 1 supported appearance ↗Source: RevenueBase lists

The company at a glance

What does J. Addison School do?

The school offers Montessori Casa for ages 3–6 and Ontario Curriculum from Elementary Grade 1 to Secondary Grade 12. The school incorporates its Focus For Success adaptive program, through which students receive personalized academic support.

Based on the company’s public LinkedIn information, supplied through RevenueBase.

What the business offers

Services & capabilities.

School academic programs

Programs include Montessori Casa for ages 3–6 and Ontario Curriculum from Elementary Grade 1 to Secondary Grade 12.

Source: LinkedIn company description · Retrieved October 13, 2026

Summer programs and courses

The school offers day camps, customized programs for overseas students, high school credit, and ESL courses during summer.

Source: LinkedIn company description · Retrieved October 13, 2026

Explore the business in context

Company lists.

Supported appearances on published RevenueBase lists, including available memberships beyond displayed rankings.

#16OF 25

Canada

Day schools

Snapshot: September 18, 2026

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J. Addison School

#16 Day schools

Snapshot: September 18, 2026

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  <img src="https://revenuebase.ai/companies/profiles/jaddisonschool/recognition-companies-day-schools-canada-20260919-9dc5c5466e2fd3983a07eb23f6d6af48fd4f7bdeae55f2b3573e5b717182f350.svg" alt="J. Addison School listed #16 on Day schools, September 18, 2026" width="220" height="319" style="max-width:100%;height:auto;" />
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Sources & data notes.

RevenueBase prepared this profile from the company’s public LinkedIn information and RevenueBase company data. These source records were retrieved on October 13, 2026. AI helped summarize these sources, with a separate automated check against the source text completed on November 4, 2026. Directory positions use company-contact counts from separate saved list snapshots dated September 18, 2026. How the company lists are built.

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