Liabilities / Assets
78th percentile
Higher debt load relative to assets than 78% of similar nonprofits.
EIN 94-2558375 • 501(c)3 • Oakland, CA
Profile
To educate children ages 18 months to 12 years using Montessori principles and other innovative teaching practices.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
78th percentile
Higher debt load relative to assets than 78% of similar nonprofits.
Liabilities / Revenue
77th percentile
Higher debt load relative to revenue than 77% of similar nonprofits.
Net Margin
22nd percentile
Higher net margin than 22% of similar nonprofits.
Top Officer Pay
82nd percentile
Higher top officer pay than 82% of similar nonprofits.
Top officer pay equals 4.7% of source-year revenue.
Asset Growth
27th percentile
Faster asset growth than 27% of similar nonprofits.
Revenue Growth
61st percentile
Faster revenue growth than 61% of similar nonprofits.
Assets
Down$3,048,982
Down $117,972 (-3.7%) from 2023
Liabilities
Up$1,175,813
Up $206,393 (+21%) from 2023
Net Assets
Down$1,873,169
Down $324,365 (-15%) from 2023
Revenue
Up$3,188,366
Up $414,200 (+15%) from 2023
Expenses
Up$3,512,731
Up $120,797 (+3.6%) from 2023
Net Income
Up-$324,365
Up $293,403 (+47%) from 2023
Most recent year
2024 • Form 990Detailed filing. Detailed filing data is available for this year.
To educate children ages 18 months to 12 years using Montessori principles and other innovative teaching practices.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Cash and Non-Interest-Bearing Accounts | $2,909,183 | $2,779,031 | ▼ $130,152 |
| Land, Buildings, and Equipment, Net | $164,014 | $155,411 | ▼ $8,603 |
| Prepaid Expenses and Deferred Charges | $56,188 | $61,862 | ▲ $5,674 |
| Other Notes and Loans Receivable, Net | - | $9,963 | - |
| Accounts Receivable | $69 | $5,215 | ▲ $5,146 |
| Total Assets | $3,166,954 | $3,048,982 | ▼ $117,972 |
| Other Assets Total | $37,500 | $37,500 | → $0 |
| Liabilities | |||
| Deferred Revenue | $842,677 | $1,062,436 | ▲ $219,759 |
| Accounts Payable and Accrued Expenses | $126,743 | $113,377 | ▼ $13,366 |
| Total Liabilities | $969,420 | $1,175,813 | ▲ $206,393 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $2,197,534 | $1,873,169 | ▼ $324,365 |
| Total Net Assets Fund Balance | $2,197,534 | $1,873,169 | ▼ $324,365 |
| Total Liabilities and Net Assets / Fund Balance | $3,166,954 | $3,048,982 | ▼ $117,972 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Leasehold Improvements | $148,497 | $85,376 | $233,873 |
| Equipment | $6,914 | $211,251 | $218,165 |
| Land | $0 | - | - |
| Name | Title | Full / Part Time | Base | Total |
|---|---|---|---|---|
| Alicia Cooper | Head of School | FT | $149,690 | $149,690 |
| Name | Title |
|---|---|
| Eric Brown | Board Member |
| John Campbell | Board Member |
| Michael Sears | Board Member |
| Monica MacDonald | Board Member |
| Tanya Susoev | Board Member |
| Line Item | Amount |
|---|---|
| Salaries, Compensation, and Employee Benefits | $2,203,327 |
| Other Expenses | $1,303,904 |
| Total Fundraising Expense | $8,299 |
| Grants and Similar Amounts Paid | $5,500 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $1,428,133 | $198,988 | $0 | $1,627,121 |
| Occupancy | $709,556 | $177,389 | $0 | $886,945 |
| Other Employee Benefits | $199,166 | $49,791 | $0 | $248,957 |
| Current Officers, Directors, Trustees, and Key Employees | $0 | $158,045 | $0 | $158,045 |
| Payroll Taxes | $104,683 | $26,171 | $0 | $130,854 |
| Fees for Services Accounting | $0 | $99,000 | $0 | $99,000 |
| Fees for Services Other | $81,808 | $15,450 | $0 | $97,258 |
| Other Expenses | $97,215 | $0 | $0 | $97,215 |
| Office Expenses | $41,300 | $9,747 | $8,299 | $59,346 |
| Pension Plan Contributions | $30,680 | $7,670 | $0 | $38,350 |
| Insurance | $23,317 | $5,829 | $0 | $29,146 |
| Conferences and Meetings | $9,782 | $2,445 | $0 | $12,227 |
| Fees for Services Legal | $0 | $11,574 | $0 | $11,574 |
| Depreciation Depletion | $6,882 | $1,721 | $0 | $8,603 |
| Grants to Domestic Orgs | $5,500 | - | - | $5,500 |
| Advertising | $0 | $1,521 | $0 | $1,521 |
| Travel | $855 | $214 | $0 | $1,069 |
| Total Functional Expenses | $2,738,877 | $765,555 | $8,299 | $3,512,731 |
| Line Item | Amount |
|---|---|
| Fundraising Direct Expenses | $5,986 |
| Fundraising Gross Income | $5,986 |
| Professional Fundraising Fees | $0 |
| Interested Party | Relationship | Description | Shared Revenue | Amount |
|---|---|---|---|---|
| John Campbell | Board Member | Building rentals | No | $278,946 |
“The school updated their bylaws during the year.”
“Form 990 reviewed at Board meeting before filing.”
“Any possible conflicts of interest discussed by Board at least annually.”
“The school uses ISBOA salary survey to review compensation for head of school.”
“The school uses ISBOA salary survey to review compensation for key employees.”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990/AccountantCompileOrReviewInd | 0 | false |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 126743 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 113377 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 69 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 5215 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | To educate children ages 18 months to 12 years using Montessori principles and other innovative teaching practices. |
| IRS990/AdvertisingGrp/FundraisingAmt | 0 | 0 |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 1521 |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 1521 |
| IRS990/AllOtherContributionsAmt | 0 | 16579 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | Grand Lake Montessori |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 5106220259 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 466 Chetwood Street |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | Oakland |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 94610 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | true |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 2909183 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 2779031 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompCurrentOfcrDirectorsGrp/FundraisingAmt | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 158045 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 158045 |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | true |
| IRS990/CompensationProcessOtherInd | 0 | true |
| IRS990/ConferencesMeetingsGrp/FundraisingAmt | 0 | 0 |
| IRS990/ConferencesMeetingsGrp/ManagementAndGeneralAmt | 0 | 2445 |
| IRS990/ConferencesMeetingsGrp/ProgramServicesAmt | 0 | 9782 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 12227 |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/ContriRptFundraisingEventAmt | 0 | 28468 |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 52597 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 5500 |
| IRS990/CYInvestmentIncomeAmt | 0 | 27102 |
| IRS990/CYOtherExpensesAmt | 0 | 1303904 |
| IRS990/CYOtherRevenueAmt | 0 | 0 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 3108667 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -324365 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 2203327 |
| IRS990/CYTotalExpensesAmt | 0 | 3512731 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 8299 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 3188366 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 842677 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 1062436 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/FundraisingAmt | 0 | 0 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 1721 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 6882 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 8603 |
| IRS990/Desc | 0 | Montessori Education The Montessori curriculum allows children to progress at a more natural pace while providing a solid academic base. The teachers are trained to teach children using the Montessori materials developed by Maria Montessori in the early 1900s. There are approximately 180 students ages 18 months to 12 years and 40 staff members. |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | true |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 36 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | true |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 2738877 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/FundraisingAmt | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 99000 |
| IRS990/FeesForServicesAccountingGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 99000 |
| IRS990/FeesForServicesLegalGrp/FundraisingAmt | 0 | 0 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 11574 |
| IRS990/FeesForServicesLegalGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 11574 |
| IRS990/FeesForServicesOtherGrp/FundraisingAmt | 0 | 0 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 15450 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 81808 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 97258 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form8282PropertyDisposedOfInd | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | Michael Sears |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | John Campbell |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | Eric Brown |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | Monica MacDonald |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | Tanya Susoev |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | Alicia Cooper |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 149690 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | Board Member |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | Board Member |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | Board Member |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | Board Member |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | Board Member |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | Head of School |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | true |
| IRS990/FormationYr | 0 | 1978 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedInd | 0 | false |
| IRS990/FundraisingActivitiesInd | 0 | false |
| IRS990/FundraisingAmt | 0 | 28468 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 5986 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 5986 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 5 |
| IRS990/GovernmentGrantsAmt | 0 | 7550 |
| IRS990/GrantAmt | 0 | 5500 |
| IRS990/GrantsToDomesticOrgsGrp/ProgramServicesAmt | 0 | 5500 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 5500 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossReceiptsAmt | 0 | 3194352 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IndependentAuditFinclStmtInd | 0 | false |
| IRS990/IndependentVotingMemberCnt | 0 | 5 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 1 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 0 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 5829 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 23317 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 29146 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 27102 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 27102 |
| IRS990/InvestmentIncomeGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/IRPDocumentCnt | 0 | 7 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 296627 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 164014 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 155411 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 452038 |
| IRS990/LegalDomicileStateCd | 0 | CA |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | To educate children ages 18 months to 12 years using Montessori principles and other innovative teaching practices. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 2197534 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 1873169 |
| IRS990/NetIncmFromFundraisingEvtGrp/ExclusionAmt | 0 | 0 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncmFromFundraisingEvtGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 2197534 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 1873169 |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OccupancyGrp/FundraisingAmt | 0 | 0 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 177389 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 709556 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 886945 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 8299 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 9747 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 41300 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 59346 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 37500 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 37500 |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 49791 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 199166 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 248957 |
| IRS990/OtherExpensesGrp/Desc | 0 | Educational materials |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 97215 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 97215 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 0 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 198988 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 1428133 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 1627121 |
| IRS990/OthNotesLoansReceivableNetGrp/EOYAmt | 0 | 9963 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | false |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 0 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 26171 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 104683 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 130854 |
| IRS990/PensionPlanContributionsGrp/FundraisingAmt | 0 | 0 |
| IRS990/PensionPlanContributionsGrp/ManagementAndGeneralAmt | 0 | 7670 |
| IRS990/PensionPlanContributionsGrp/ProgramServicesAmt | 0 | 30680 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 38350 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 56188 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 61862 |
| IRS990/PrincipalOfficerNm | 0 | Michael Sears |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 611110 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 1 | 611110 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | Tuition |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | Other program revenue |
| IRS990/ProgramServiceRevenueGrp/ExclusionAmt | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/ExclusionAmt | 1 | 0 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 3044032 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 1 | 64635 |
| IRS990/ProgramServiceRevenueGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/UnrelatedBusinessRevenueAmt | 1 | 0 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 51713 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 1799 |
| IRS990/PYInvestmentIncomeAmt | 0 | 13609 |
| IRS990/PYOtherExpensesAmt | 0 | 1259784 |
| IRS990/PYOtherRevenueAmt | 0 | 0 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 2708844 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | -617768 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 2130351 |
| IRS990/PYTotalExpensesAmt | 0 | 3391934 |
| IRS990/PYTotalRevenueAmt | 0 | 2774166 |
| IRS990/QuidProQuoContributionsInd | 0 | false |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | false |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | -324365 |
| IRS990/RegularMonitoringEnfrcInd | 0 | true |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | false |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RevenueAmt | 0 | 3108667 |
| IRS990ScheduleA/InvestmentIncomeCYPct | 0 | 0 |
| IRS990ScheduleA/OtherSupportSumAmt | 0 | 0 |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0 |
| IRS990ScheduleA/PublicSupportCY509Pct | 0 | 0 |
| IRS990ScheduleA/PublicSupportTotal509Amt | 0 | 0 |
| IRS990ScheduleA/SchoolInd | 0 | X |
| IRS990/ScheduleBRequiredInd | 0 | false |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 6914 |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 211251 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 218165 |
| IRS990ScheduleD/LandGrp/BookValueAmt | 0 | 0 |
| IRS990ScheduleD/LandGrp/InvestmentCostOrOtherBasisAmt | 0 | 0 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/BookValueAmt | 0 | 148497 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/DepreciationAmt | 0 | 85376 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/OtherCostOrOtherBasisAmt | 0 | 233873 |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 155411 |
| IRS990ScheduleE/ComplianceWithRevProc7550Ind | 0 | true |
| IRS990ScheduleE/DiscriminateRaceAdmissPlcyInd | 0 | false |
| IRS990ScheduleE/DiscriminateRaceAthltProgInd | 0 | false |
| IRS990ScheduleE/DiscriminateRaceEducPlcyInd | 0 | false |
| IRS990ScheduleE/DiscriminateRaceEmplmFcultyInd | 0 | false |
| IRS990ScheduleE/DiscriminateRaceOtherActyInd | 0 | false |
| IRS990ScheduleE/DiscriminateRaceSchsInd | 0 | false |
| IRS990ScheduleE/DiscriminateRaceStdntsRghtsInd | 0 | false |
| IRS990ScheduleE/DiscriminateRaceUseOfFcltsInd | 0 | false |
| IRS990ScheduleE/GovernmentFinancialAidRcvdInd | 0 | false |
| IRS990ScheduleE/GovernmentFinancialAidRvkdInd | 0 | false |
| IRS990ScheduleE/MaintainCpyOfAllSolInd | 0 | true |
| IRS990ScheduleE/MaintainCpyOfBrochuresEtcInd | 0 | true |
| IRS990ScheduleE/MaintainRacialCompRecsInd | 0 | true |
| IRS990ScheduleE/MaintainScholarshipsRecsInd | 0 | true |
| IRS990ScheduleE/NondiscriminatoryPolicyStmtInd | 0 | true |
| IRS990ScheduleE/PlcyPblczdViaBroadcastMediaInd | 0 | true |
| IRS990ScheduleE/PolicyStmtInBrochuresEtcInd | 0 | true |
| IRS990ScheduleE/SupplementalInformationDetail/ExplanationTxt | 0 | Notice of non-discriminatory policy ad to students posted in the San Francisco Chronicle. Notice of non-discriminatory policy ad to students posted in the San Francisco Chronicle. |
| IRS990ScheduleE/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | Line 3 |
| IRS990/ScheduleJRequiredInd | 0 | false |
| IRS990ScheduleL/BusTrInvolveInterestedPrsnGrp/NameOfInterested/PersonNm | 0 | John Campbell |
| IRS990ScheduleL/BusTrInvolveInterestedPrsnGrp/RelationshipDescriptionTxt | 0 | Board Member |
| IRS990ScheduleL/BusTrInvolveInterestedPrsnGrp/SharingOfRevenuesInd | 0 | false |
| IRS990ScheduleL/BusTrInvolveInterestedPrsnGrp/TransactionAmt | 0 | 278946 |
| IRS990ScheduleL/BusTrInvolveInterestedPrsnGrp/TransactionDesc | 0 | Building rentals |
| IRS990/ScheduleORequiredInd | 0 | true |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | The school updated their bylaws during the year. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | Form 990 reviewed at Board meeting before filing. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | Any possible conflicts of interest discussed by Board at least annually. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | The school uses ISBOA salary survey to review compensation for head of school. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 4 | The school uses ISBOA salary survey to review compensation for key employees. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | Pt VI, Line 4 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | Pt VI, Line 11b |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | Pt VI, Line 12c |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | Pt VI, Line 15a |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 4 | Pt VI, Line 15b |
| IRS990/SchoolOperatingInd | 0 | true |
| IRS990/SignificantChangeInd | 0 | false |
| IRS990/SignificantNewProgramSrvcInd | 0 | false |
| IRS990/StatesWhereCopyOfReturnIsFldCd | 0 | CA |
| IRS990/SubjectToProxyTaxInd | 0 | false |
| IRS990/TaxablePartyNotificationInd | 0 | false |
| IRS990/TaxExemptBondsInd | 0 | false |
| IRS990/TerminateOperationsInd | 0 | false |
| IRS990/TotalAssetsBOYAmt | 0 | 3166954 |
| IRS990/TotalAssetsEOYAmt | 0 | 3048982 |
| IRS990/TotalAssetsGrp/BOYAmt | 0 | 3166954 |
| IRS990/TotalAssetsGrp/EOYAmt | 0 | 3048982 |
| IRS990/TotalCompGreaterThan150KInd | 0 | false |
| IRS990/TotalContributionsAmt | 0 | 52597 |
| IRS990/TotalEmployeeCnt | 0 | 36 |
| IRS990/TotalFunctionalExpensesGrp/FundraisingAmt | 0 | 8299 |
| IRS990/TotalFunctionalExpensesGrp/ManagementAndGeneralAmt | 0 | 765555 |
| IRS990/TotalFunctionalExpensesGrp/ProgramServicesAmt | 0 | 2738877 |
| IRS990/TotalFunctionalExpensesGrp/TotalAmt | 0 | 3512731 |
| IRS990/TotalGrossUBIAmt | 0 | 0 |
| IRS990/TotalLiabilitiesBOYAmt | 0 | 969420 |
| IRS990/TotalLiabilitiesEOYAmt | 0 | 1175813 |
| IRS990/TotalLiabilitiesGrp/BOYAmt | 0 | 969420 |
| IRS990/TotalLiabilitiesGrp/EOYAmt | 0 | 1175813 |
| IRS990/TotalNetAssetsFundBalanceGrp/BOYAmt | 0 | 2197534 |
| IRS990/TotalNetAssetsFundBalanceGrp/EOYAmt | 0 | 1873169 |
| IRS990/TotalOtherCompensationAmt | 0 | 0 |
| IRS990/TotalProgramServiceExpensesAmt | 0 | 2738877 |
| IRS990/TotalProgramServiceRevenueAmt | 0 | 3108667 |
| IRS990/TotalReportableCompFromOrgAmt | 0 | 149690 |
| IRS990/TotalRevenueGrp/ExclusionAmt | 0 | 27102 |
| IRS990/TotalRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 3108667 |
| IRS990/TotalRevenueGrp/TotalRevenueColumnAmt | 0 | 3188366 |
| IRS990/TotalRevenueGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/TotalVolunteersCnt | 0 | 3 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/BOYAmt | 0 | 3166954 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/EOYAmt | 0 | 3048982 |
| IRS990/TotReportableCompRltdOrgAmt | 0 | 0 |
| IRS990/TravelGrp/FundraisingAmt | 0 | 0 |
| IRS990/TravelGrp/ManagementAndGeneralAmt | 0 | 214 |
| IRS990/TravelGrp/ProgramServicesAmt | 0 | 855 |
| IRS990/TravelGrp/TotalAmt | 0 | 1069 |
| IRS990/TrnsfrExmptNonChrtblRltdOrgInd | 0 | false |
| IRS990/TypeOfOrganizationCorpInd | 0 | X |
| IRS990/UnrelatedBusIncmOverLimitInd | 0 | false |
| IRS990/UponRequestInd | 0 | X |
| IRS990/USAddress/AddressLine1Txt | 0 | 466 Chetwood St |
| IRS990/USAddress/CityNm | 0 | Oakland |
| IRS990/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/USAddress/ZIPCd | 0 | 94610 |
| IRS990/VotingMembersGoverningBodyCnt | 0 | 5 |
| IRS990/VotingMembersIndependentCnt | 0 | 5 |
| IRS990/WebsiteAddressTxt | 0 | grandlakemontessori.com |
| IRS990/WhistleblowerPolicyInd | 0 | true |
| ReturnHeader/BuildTS | 0 | 2025-03-06 01:10:19Z |
| ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd | 0 | true |
| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | Michael Sears |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | Board Member |
| ReturnHeader/BusinessOfficerGrp/PhoneNum | 0 | 5106220259 |
| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2024-10-22 |
| ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt | 0 | Grand Lake Montessori Inc |
| ReturnHeader/Filer/BusinessNameControlTxt | 0 | GRAN |
| ReturnHeader/Filer/EIN | 0 | 942558375 |
| ReturnHeader/Filer/PhoneNum | 0 | 5106220259 |
| ReturnHeader/Filer/USAddress/AddressLine1Txt | 0 | 466 Chetwood Street |
| ReturnHeader/Filer/USAddress/CityNm | 0 | Oakland |
| ReturnHeader/Filer/USAddress/StateAbbreviationCd | 0 | CA |
| ReturnHeader/Filer/USAddress/ZIPCd | 0 | 94610 |
| ReturnHeader/IRSResponsiblePrtyInfoCurrInd | 0 | true |
| ReturnHeader/PreparerFirmGrp/PreparerFirmEIN | 0 | 943359608 |
| ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt | 0 | Moss CPA |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/AddressLine1Txt | 0 | 201 N Civic Drive Suite 210 |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm | 0 | Walnut Creek |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/StateAbbreviationCd | 0 | CA |
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