Data update history
March 26, 2025
Updated personnel
Identified 2 new personnel
May 18, 2024
Posted financials
Added Form 990 for fiscal year 2023
July 5, 2023
Posted financials
Added Form 990 for fiscal year 2022
June 29, 2023
Posted financials
Added Form 990 for fiscal year 2021
May 31, 2023
Updated personnel
Identified 1 new personnel
Nonprofit Types
SchoolsCharter schoolsK-12 schoolsCharities
Issues
Education
Characteristics
State / local levelReceives government fundingTax deductible donationsAccepts online donations
General information
- Address
- 13809 Se Division St
- Portland, OR 97236
- Metro area
- Portland-Vancouver-Hillsboro, OR-WA
- County
- Multnomah County, OR
- Website URL
- sites.google.com/arthuracademy.org/board/home?authuser=0
- Phone
- (503) 252-3753
IRS details
- EIN
- 93-1278639
- Fiscal year end
- June
- Taxreturn type
- Form 990
- Year formed
- 1999
- Eligible to receive tax-deductible contributions (Pub 78)
- Yes
Categorization
- NTEE code, primary
- B29: Charter Schools
- NAICS code, primary
- 611110: Elementary and Secondary Schools
- Parent/child status
- Independent
Free account sign-up
Want updates when Mastery Learning Institute has new information, or want to find more organizations like Mastery Learning Institute?
Create free Cause IQ account