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Mastery Learning Institute ABN Arthur Academy

Public charity
DBA: % BONNIE GROSSEN
Other · PORTLAND, OR · EIN 93-1278639

About

Operation of a public charter school

In care of Bonnie Grossen

Donations are tax-deductible
Category
Other
Employees
142
Volunteers
84

Financial Snapshot

FY ending 2025-06-30
Revenue
$13.0M
Expenses
$11.4M
Assets
$19.8M
Liabilities
$12.8M

Financial history

$13.0M$6.5M$0
16171819202122232425
RevenueExpenses
Latest FY2025: $13.0M · Avg: $9.3M
MASTERY LEARNING INSTITUTE ABN ARTHUR ACADEMY
Your actions

Address

13717 SE Division ST
Portland, OR, 97236-284

Governance

Voting board members5
Independent members5
Conflict-of-interest policyYes
Whistleblower policyYes
Doc-retention policyYes
990 reviewed by boardYes

Compensation practices

Initial contract exceptionNo
Public records
ProPublica Nonprofit Explorer ↗
Full 990 PDFs going back to 2001, plus parsed financial extracts. The easiest place to read actual filings.
IRS Tax Exempt Organization Search ↗
IRS-side authoritative source. Confirms current exempt status and pulls the latest determination letter.
These open in a new tab. AllCiv doesn't host filings directly — these are the authoritative public-record sources.