Liabilities / Assets
77th percentile
Higher debt load relative to assets than 77% of similar nonprofits.
STEM Preparatory Schools Inc
EIN 26-3881506 • 501(c)3 • Los Angeles, CA
Profile
The mission of stem preparatory is to operate a small network of high performing schools, in a targeted area of los angeles and develop 5th through 12th grade scholars into successful college graduates and professionals, through equal access and inspiration, rigorous curriculum, and a commitment to our core values.
Siviq Scores
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
0.56x
Liabilities / Revenue
74th percentile
Higher debt load relative to revenue than 74% of similar nonprofits.
Net Margin
53rd percentile
Higher net margin than 53% of similar nonprofits.
Top Officer Pay
69th percentile
Higher top officer pay than 69% of similar nonprofits.
Top officer pay equals 1.3% of source-year revenue.
Asset Growth
34th percentile
Faster asset growth than 34% of similar nonprofits.
Revenue Growth
64th percentile
Faster revenue growth than 64% of similar nonprofits.
Balance Sheet
Assets
Up$38,202,898
Up $440,045 (+1.2%) from 2023
Liabilities
Down$21,457,346
Down $585,292 (-2.7%) from 2023
Net Assets
Up$16,745,552
Up $1,025,337 (+6.5%) from 2023
Revenue
Up$28,394,907
Up $3,601,665 (+15%) from 2023
Expenses
Up$26,793,308
Up $2,181,978 (+8.9%) from 2023
Net Income
Up$1,601,599
Up $1,419,687 (+780%) from 2023
Trend Graphs
Filings
Most recent year
2024 • Form 990Detailed filing. Detailed filing data is available for this year.
- Assets
- $38,202,898
- Liabilities
- $21,457,346
- Net assets
- $16,745,552
- Revenue
- $28,394,907
- Expenses
- $26,793,308
- Net income
- $1,601,599
Latest Filing Detail
Jump To
Filing Snapshot
- Filing Period
- Jul 1, 2023 to Jun 30, 2024
- Signed
- May 12, 2025
- Return Version
- 2023v6.0
- Gross Receipts
- $28,394,907
Mission and Program Overview
Mission
The mission of stem preparatory schools is to operate a small network of high performing schools, in a targeted area of los angeles and to develop tk through 12th grade scholars into successful college graduates and professionals, through equal access and inspiration, rigorous curriculum, and a commitment to our core values.
The mission of stem prep schools is to operate a small network of high performing schools, in a targeted area of los angeles and develop 5th 12th grade scholars into successful college graduates and professionals, through equal access and inspiration, rigorous curriculum, and a commitment to our core values.
Balance Sheet Detail
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Cash and Non-Interest-Bearing Accounts | $14,130,153 | $15,977,900 | ▲ $1,847,747 |
| Accounts Receivable | $3,553,913 | $2,875,311 | ▼ $678,602 |
| Land, Buildings, and Equipment, Net | $2,559,559 | $2,663,673 | ▲ $104,114 |
| Other Notes and Loans Receivable, Net | $576,262 | - | - |
| Prepaid Expenses and Deferred Charges | $327,716 | $280,900 | ▼ $46,816 |
| Pledges and Grants Receivable | $353,661 | $113,870 | ▼ $239,791 |
| Total Assets | $37,762,853 | $38,202,898 | ▲ $440,045 |
| Other Assets Total | $16,261,589 | $16,291,244 | ▲ $29,655 |
| Liabilities | |||
| Other Liabilities | $15,313,219 | $15,190,956 | ▼ $122,263 |
| Deferred Revenue | $4,779,019 | $4,491,415 | ▼ $287,604 |
| Accounts Payable and Accrued Expenses | $1,950,400 | $1,774,975 | ▼ $175,425 |
| Total Liabilities | $22,042,638 | $21,457,346 | ▼ $585,292 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $15,515,280 | $16,646,936 | ▲ $1,131,656 |
| Net Assets With Donor Restrictions | $204,935 | $98,616 | ▼ $106,319 |
| Total Net Assets Fund Balance | $15,720,215 | $16,745,552 | ▲ $1,025,337 |
| Total Liabilities and Net Assets / Fund Balance | $37,762,853 | $38,202,898 | ▲ $440,045 |
Asset Categories
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Land | $1,825,869 | - | $1,825,869 |
| Leasehold Improvements | $201,391 | $734,240 | $935,631 |
| Buildings | $585,463 | $140,412 | $725,875 |
| Equipment | $43,050 | $151,661 | $194,711 |
| Other Land Buildings | $7,900 | - | $7,900 |
| Other Assets Org | $15,341,571 | - | - |
Compensation and Service Providers
Employees
| Name | Title | Full / Part Time | Base | Other | Total |
|---|---|---|---|---|---|
| Emilio Pack | CEO | FT | $292,107 | $65,287 | $357,394 |
| Janette Rodriguez-pack | CAO | FT | $173,189 | $40,108 | $213,297 |
| Eric Barlow | COO | FT | $136,087 | $17,968 | $154,055 |
| Daniel Moreno | Principal | FT | $115,714 | $37,882 | $153,596 |
| Gilliane Holt | Principal | FT | $122,107 | $29,881 | $151,988 |
| Maria Avancena | Principal | FT | $113,936 | $24,028 | $137,964 |
| Brittany Reeser | Director of Math | FT | $107,776 | $28,590 | $136,366 |
Board Members and Trustees
| Name | Title |
|---|---|
| Carmen Vazquez | Chair |
| Brad Zutaut | Director |
| Dale Henry | Director |
| Desmond Lovell | Secretary |
| Andrew Kubasek | Treasurer |
Revenue and Support
Revenue Composition
- Contributions and Grants
- $28,054,334
- Program Service Revenue
- $0
- Investment Income
- $338,045
- Other Revenue
- $2,528
- All Other Contributions
- $254,213
- Change in Net Assets
- $1,601,599
Expenses and Functional Allocation
Major Expense Lines
| Line Item | Amount |
|---|---|
| Salaries, Compensation, and Employee Benefits | $17,787,228 |
| Other Expenses | $8,987,480 |
| Grants and Similar Amounts Paid | $18,600 |
| Total Fundraising Expense | $2,657 |
| Professional Fundraising Fees | $0 |
Functional Expense Allocation
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $11,400,965 | $1,929,071 | - | $13,330,036 |
| Fees for Services Other | $2,794,076 | $784,260 | - | $3,578,336 |
| Pension Plan Contributions | $1,831,645 | $25,180 | - | $1,856,825 |
| Other Employee Benefits | $1,362,702 | $265,832 | - | $1,628,534 |
| Occupancy | $1,240,550 | $239,753 | - | $1,480,303 |
| Office Expenses | $150,055 | $448,634 | - | $598,689 |
| Current Officers, Directors, Trustees, and Key Employees | $10,496 | $514,287 | - | $524,783 |
| Payroll Taxes | $286,258 | $160,792 | - | $447,050 |
| All Other Expenses | $319,116 | - | - | $319,116 |
| Insurance | - | $298,496 | - | $298,496 |
| Other Expenses | $272,570 | $279,006 | $2,657 | $272,570 |
| Depreciation Depletion | $146,856 | - | - | $146,856 |
| Information Technology | - | $115,208 | - | $115,208 |
| Advertising | - | $104,429 | - | $104,429 |
| Fees for Services Accounting | - | $73,452 | - | $73,452 |
| Travel | $70,979 | - | - | $70,979 |
| Fees for Services Legal | - | $63,629 | - | $63,629 |
| Grants to Domestic Individuals | $18,600 | - | - | $18,600 |
| Total Functional Expenses | $21,488,622 | $5,302,029 | $2,657 | $26,793,308 |
Fundraising, Events, and Gaming
- Fundraising activities
- No
- Gaming activities
- No
- Professional fundraiser used
- No
Fundraising and Gaming Totals
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
Political and Lobbying Activity
- Political campaign activity
- No
- Lobbying activity
- No
- Subject to proxy tax
- No
Debt and Bond Financing
Other Reported Liabilities
| Liability | Amount |
|---|---|
| Operating Lease Liability | $15,186,611 |
| Intercompany Payables | $4,345 |
Governance and Compliance
Governance Checklist
- Compiled or reviewed by an accountant
- No
- Annual disclosure for covered persons
- Yes
- Audit committee
- Yes
- Backup withholding compliance
- Yes
- Business relationship with 35% controlled entity
- No
- Business relationship with family members
- No
- Business relationship with organization members
- No
- Material changes to governing documents
- No
- Compensation from other sources disclosed
- No
- CEO compensation reviewed
- Yes
- Other officer compensation reviewed
- Yes
- Conflict-of-interest policy
- Yes
- Audited financial statements prepared
- Yes
- Key decisions subject to board approval
- No
- Management duties delegated
- No
Governance Explanations
Form 990, Part VI, Section A, Line 2
“Carmen vazquez (director) and dale henry (director) are married. Emilio pack (ceo) and janette rodriguez-pack (cao) are married.”
Form 990, Part VI, Section A, Line 8B
“There are no committees that have the authority to act on behalf of the governing board.”
Form 990, Part VI, Section B, Line 11B
“The form 990 is prepared by the organization's outside public accounting firm based on information provided by management. Once a draft of the return is available, it is reviewed by management, the organization's third party service provider, and the board of directors prior to submitting to the irs.”
Form 990, Part VI, Section B, Line 12C
“Monitoring is performed regularly by the officers to identify potential conflicts of interest. Any question of a conflict is addressed with the board members, officers, employees, etc. Who are required to disclose the existence of any financial interest and be afforded the opportunity to disclose all material facts to the board and executive director. If a conflict of interest is identified, the appropriate action is taken, including limitations to the individual's influence on related business matters.”
Form 990, Part VI, Section B, Line 15
“The officers and key employees' pay is determine based on data provided by external charter management organizations and through comparison studies of other charter schools. The board must vote to approve the officers and key employees' compensation as a direct action. The process described here was last completed in 2024.”
Form 990, Part VI, Section C, Line 19
“The organization's governing documents, conflict of interest policy, and financial statements are made available to the public upon request.”
Filing and Contact Details
Filer
- Filer Name
- Stem Preparatory Schools
- EIN
- 26-3881506
- Phone
- 3237950695
- Address
- 3200 W ADAMS BLVD, LOS ANGELES, CA 90018
Signing Officer
- Name
- Eric Barlow
- Title
- COO
- Phone
- 3237950695
- Signed
- 2025-05-12
- Discuss with paid preparer
- Yes
Organization Details
- Principal Officer
- Emilio Pack
- Formed
- 2008
- Legal Domicile
- CA
- Voting Board Members
- 5
- Independent Board Members
- 5
- Employees
- 285
- Volunteers
- 25
Preparer
- Firm
- Cliftonlarsonallen Llp
- Address
- 2210 EAST ROUTE 66, GLENDORA, CA 91740
- Preparer
- Marlen Gomez
- Phone
- 6268577300
Supplemental Narrative
Additional Explanations
Form 990, Part IX, Line 11G
“Other fees for services: program service expenses 716,976. Management and general expenses 784,260. Fundraising expenses 0. Total expenses 1,501,236. Special education services: program service expenses 973,555. Management and general expenses 0. Fundraising expenses 0. Total expenses 973,555. After school services: program service expenses 1,103,545. Management and general expenses 0. Fundraising expenses 0. Total expenses 1,103,545.”
FORM 990, PART XI, LINE 9:
“RESTATEMENT -576,262.”
FORM 990, PART XII, LINE 2C:
“The process for oversight and selection of an independent accountant has not changed from the prior year.”
Financial Statement Notes
PART X, LINE 2:
“Stem prep is organized as a california nonprofit corporation and has been recognized by the internal revenue service (irs) as exempt from federal income taxes under section 501(a) of the irc as an organization described in section 501(c)(3), and qualifies for the charitable contribution deduction under section 170(b)(1)(a)(vi). It is also exempt from state franchise and income taxes under section 23701(d) of the california revenue and taxation code. Stem prep is annually required to file a return of organization exempt from income tax (form 990) with the irs. In addition, stem prep is subject to income tax on net income that is derived from business activities that are unrelated to its exempt purposes. Stem prep determined that it is not subject to unrelated business income tax and has not filed an exempt organization business income tax return (form 990t) with the irs. Management believes that stem prep has appropriate support for any tax positions taken affecting its annual filing requirements, and as such, does not have any uncertain tax positions that are material to the financial statements. Stem prep would recognize future accrued interest and penalties related to unrecognized tax benefits and liabilities in income tax expense if such interest and penalties are incurred.”
Raw XML AppendixShowing 400 of 616 raw XML fields
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
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| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 2875311 |
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| IRS990/ActivityOrMissionDesc | 0 | THE MISSION OF STEM PREP SCHOOLS IS TO OPERATE A SMALL NETWORK OF HIGH PERFORMING SCHOOLS, IN A TARGETED AREA OF LOS ANGELES AND DEVELOP 5TH 12TH GRADE SCHOLARS INTO SUCCESSFUL COLLEGE GRADUATES AND PROFESSIONALS, THROUGH EQUAL ACCESS AND INSPIRATION, RIGOROUS CURRICULUM, AND A COMMITMENT TO OUR CORE VALUES. |
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| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 90018 |
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| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 146856 |
| IRS990/Desc | 0 | STEM PREPARATORY SCHOOLS OPERATES 3 PUBLIC CHARTER SCHOOLS. DURING THE YEAR ENDED JUNE 30, 2024 STEM PREPARATORY ELEMENTARY SCHOOL SERVED APPROXIMATELY 319 STUDENTS IN GRADES TK-5TH, CROWN PREPARATORY ACADEMY SERVED APPROXIMATELY 452 STUDENTS IN GRADES 5TH-8TH, AND MATH AND SCIENCE COLLEGE PREPARATORY SCHOOL SERVED APPROXIMATELY 534 STUDENTS IN GRADES 9TH-12TH. THE SCHOOLS PROVIDED STUDENTS INSTRUCTION FOR 175-182 DAYS. |
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| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | CEO |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | COO |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | CAO |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | PRINCIPAL |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | PRINCIPAL |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | PRINCIPAL |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | DIRECTOR OF MATH |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | DIRECTOR |
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| IRS990/FormationYr | 0 | 2008 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/ConsolidatedBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 5 |
| IRS990/GovernmentGrantsAmt | 0 | 27800121 |
| IRS990/GrantAmt | 0 | 18600 |
| IRS990/GrantsToDomesticIndividualsGrp/ProgramServicesAmt | 0 | 18600 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 18600 |
| IRS990/GrantsToIndividualsInd | 0 | 1 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossReceiptsAmt | 0 | 28394907 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 5 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 14 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartIXInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIInd | 0 | X |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 115208 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 115208 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 298496 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 298496 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 338045 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 338045 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/IRPDocumentCnt | 0 | 31 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 1026313 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 2559559 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 2663673 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 3689986 |
| IRS990/LegalDomicileStateCd | 0 | CA |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 0 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | THE MISSION OF STEM PREPARATORY SCHOOLS IS TO OPERATE A SMALL NETWORK OF HIGH PERFORMING SCHOOLS, IN A TARGETED AREA OF LOS ANGELES AND TO DEVELOP TK THROUGH 12TH GRADE SCHOLARS INTO SUCCESSFUL COLLEGE GRADUATES AND PROFESSIONALS, THROUGH EQUAL ACCESS AND INSPIRATION, RIGOROUS CURRICULUM, AND A COMMITMENT TO OUR CORE VALUES. |
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| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
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| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 16745552 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 15515280 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 16646936 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 239753 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 1240550 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 1480303 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 448634 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 150055 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 598689 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 16261589 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 16291244 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | -576262 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 265832 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 1362702 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 1628534 |
| IRS990/OtherExpensesGrp/Desc | 0 | NUTRITION PROGRAM FOOD |
| IRS990/OtherExpensesGrp/Desc | 1 | OTHER EXPENSES |
| IRS990/OtherExpensesGrp/Desc | 2 | INSTRUCTIONAL MATERIALS |
| IRS990/OtherExpensesGrp/Desc | 3 | SPECIAL EDUCATION FEES |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 2657 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 279006 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 803344 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 275340 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 505070 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 272570 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 803344 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 557003 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 505070 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 272570 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 15313219 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 15190956 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 0 | 900099 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | OTHER REVENUE |
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| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 2528 |
| IRS990/OtherRevenueTotalAmt | 0 | 2528 |
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| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 11400965 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 13330036 |
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| IRS990/PartialLiquidationInd | 0 | 0 |
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| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 160792 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 286258 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 447050 |
| IRS990/PensionPlanContributionsGrp/ManagementAndGeneralAmt | 0 | 25180 |
| IRS990/PensionPlanContributionsGrp/ProgramServicesAmt | 0 | 1831645 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 1856825 |
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| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 113870 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 327716 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 280900 |
| IRS990/PrincipalOfficerNm | 0 | EMILIO PACK |
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| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 24757697 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 15000 |
| IRS990/PYInvestmentIncomeAmt | 0 | 32812 |
| IRS990/PYOtherExpensesAmt | 0 | 8159131 |
| IRS990/PYOtherRevenueAmt | 0 | 2733 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 181912 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 16437199 |
| IRS990/PYTotalExpensesAmt | 0 | 24611330 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 24793242 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 1601599 |
| IRS990/RegularMonitoringEnfrcInd | 0 | 1 |
| IRS990/RelatedEntityInd | 0 | 1 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 1 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 1 |
| IRS990/ReportOtherAssetsInd | 0 | 1 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 1 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/RevenueAmt | 0 | 0 |
| IRS990ScheduleA/SchoolInd | 0 | X |
| IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorNum | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine2 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/City | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/State | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCode | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt | 0 | RESTRICTED |
| IRS990/ScheduleBRequiredInd | 0 | 1 |
| IRS990ScheduleD/BuildingsGrp/BookValueAmt | 0 | 585463 |
| IRS990ScheduleD/BuildingsGrp/DepreciationAmt | 0 | 140412 |
| IRS990ScheduleD/BuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 725875 |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 43050 |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 151661 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 194711 |
| IRS990ScheduleD/FootnoteTextInd | 0 | X |
| IRS990ScheduleD/LandGrp/BookValueAmt | 0 | 1825869 |
| IRS990ScheduleD/LandGrp/OtherCostOrOtherBasisAmt | 0 | 1825869 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/BookValueAmt | 0 | 201391 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/DepreciationAmt | 0 | 734240 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/OtherCostOrOtherBasisAmt | 0 | 935631 |
| IRS990ScheduleD/OtherAssetsOrgGrp/BookValueAmt | 0 | 45653 |
| IRS990ScheduleD/OtherAssetsOrgGrp/BookValueAmt | 1 | 845515 |
| IRS990ScheduleD/OtherAssetsOrgGrp/BookValueAmt | 2 | 58505 |
| IRS990ScheduleD/OtherAssetsOrgGrp/BookValueAmt | 3 | 15341571 |
| IRS990ScheduleD/OtherAssetsOrgGrp/Desc | 0 | INTERCOMPANY RECEIVABLES |
| IRS990ScheduleD/OtherAssetsOrgGrp/Desc | 1 | CAPITAL CONTRIBUTION |
| IRS990ScheduleD/OtherAssetsOrgGrp/Desc | 2 | DEPOSITS |
| IRS990ScheduleD/OtherAssetsOrgGrp/Desc | 3 | OPERATING ROU ASSET |
| IRS990ScheduleD/OtherLandBuildingsGrp/BookValueAmt | 0 | 7900 |
| IRS990ScheduleD/OtherLandBuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 7900 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 0 | 15186611 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 1 | 4345 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 0 | OPERATING LEASE LIABILITY |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 1 | INTERCOMPANY PAYABLES |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | STEM PREP IS ORGANIZED AS A CALIFORNIA NONPROFIT CORPORATION AND HAS BEEN RECOGNIZED BY THE INTERNAL REVENUE SERVICE (IRS) AS EXEMPT FROM FEDERAL INCOME TAXES UNDER SECTION 501(A) OF THE IRC AS AN ORGANIZATION DESCRIBED IN SECTION 501(C)(3), AND QUALIFIES FOR THE CHARITABLE CONTRIBUTION DEDUCTION UNDER SECTION 170(B)(1)(A)(VI). IT IS ALSO EXEMPT FROM STATE FRANCHISE AND INCOME TAXES UNDER SECTION 23701(D) OF THE CALIFORNIA REVENUE AND TAXATION CODE. STEM PREP IS ANNUALLY REQUIRED TO FILE A RETURN OF ORGANIZATION EXEMPT FROM INCOME TAX (FORM 990) WITH THE IRS. IN ADDITION, STEM PREP IS SUBJECT TO INCOME TAX ON NET INCOME THAT IS DERIVED FROM BUSINESS ACTIVITIES THAT ARE UNRELATED TO ITS EXEMPT PURPOSES. STEM PREP DETERMINED THAT IT IS NOT SUBJECT TO UNRELATED BUSINESS INCOME TAX AND HAS NOT FILED AN EXEMPT ORGANIZATION BUSINESS INCOME TAX RETURN (FORM 990T) WITH THE IRS. MANAGEMENT BELIEVES THAT STEM PREP HAS APPROPRIATE SUPPORT FOR ANY TAX POSITIONS TAKEN AFFECTING ITS ANNUAL FILING REQUIREMENTS, AND AS SUCH, DOES NOT HAVE ANY UNCERTAIN TAX POSITIONS THAT ARE MATERIAL TO THE FINANCIAL STATEMENTS. STEM PREP WOULD RECOGNIZE FUTURE ACCRUED INTEREST AND PENALTIES RELATED TO UNRECOGNIZED TAX BENEFITS AND LIABILITIES IN INCOME TAX EXPENSE IF SUCH INTEREST AND PENALTIES ARE INCURRED. |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART X, LINE 2: |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 2663673 |
| IRS990ScheduleD/TotalBookValueOtherAssetsAmt | 0 | 16291244 |
| IRS990ScheduleD/TotalLiabilityAmt | 0 | 15190956 |
| IRS990ScheduleE/ComplianceWithRevProc7550Ind | 0 | 1 |
| IRS990ScheduleE/DiscriminateRaceAdmissPlcyInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceAthltProgInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceEducPlcyInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceEmplmFcultyInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceOtherActyInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceSchsInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceStdntsRghtsInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceUseOfFcltsInd | 0 | 0 |
| IRS990ScheduleE/GovernmentFinancialAidRcvdInd | 0 | 1 |
| IRS990ScheduleE/GovernmentFinancialAidRvkdInd | 0 | 0 |
| IRS990ScheduleE/MaintainCpyOfAllSolInd | 0 | 1 |
| IRS990ScheduleE/MaintainCpyOfBrochuresEtcInd | 0 | 1 |
| IRS990ScheduleE/MaintainRacialCompRecsInd | 0 | 1 |
| IRS990ScheduleE/MaintainScholarshipsRecsInd | 0 | 0 |
| IRS990ScheduleE/NondiscriminatoryPolicyStmtInd | 0 | 1 |
| IRS990ScheduleE/PlcyPblczdViaBroadcastMediaInd | 0 | 1 |
| IRS990ScheduleE/PolicyStmtInBrochuresEtcInd | 0 | 1 |
| IRS990ScheduleE/SupplementalInformationDetail/ExplanationTxt | 0 | NONDISCRIMNATORY POLICY INCLUDED IN ALL ADVERTISEMENTS, ENROLLMENT MATERIALS AND CHARTER BY-LAWS. |
| IRS990ScheduleE/SupplementalInformationDetail/ExplanationTxt | 1 | AS A PUBLIC CHARTER SCHOOL, THE SCHOOL DOES NOT PROVIDE SCHOLARSHIPS OR FINANCIAL AID. |
| IRS990ScheduleE/SupplementalInformationDetail/ExplanationTxt | 2 | THE ORGANIZATION OPERATES CHARTER SCHOOLS, WHICH ARE PRINCIPALLY FUNDED BY CALIFORNIA AND FEDERAL MONIES RECEIVED THROUGH THE CALIFORNIA DEPARTMENT OF EDUCATION. |
| IRS990ScheduleE/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | SCHEDULE E, PART I, LINE 3 |
| IRS990ScheduleE/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | SCHEDULE E, PART I, LINE 4 |
| IRS990ScheduleE/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | SCHEDULE E, PART I, LINE 6 |
| IRS990ScheduleI/GrantRecordsMaintainedInd | 0 | 1 |
| IRS990ScheduleI/GrantsOtherAsstToIndivInUSGrp/CashGrantAmt | 0 | 18600 |
| IRS990ScheduleI/GrantsOtherAsstToIndivInUSGrp/GrantTypeTxt | 0 | GRANTS ARE MADE TO STUDENTS FOR POST-GRADUATION EDUCATIONAL EXPENSES |
| IRS990ScheduleI/GrantsOtherAsstToIndivInUSGrp/RecipientCnt | 0 | 31 |
| IRS990ScheduleI/SupplementalInformationDetail/ExplanationTxt | 0 | ALL SCHOLARSHIP APPLICATIONS ARE REVIEWED ON A CASE-BY-CASE BASIS TO DETERMINE HOW A SCHOLARSHIP AWARD MAY HELP EACH STUDENT PREPARE FOR COLLEGE, COMPLETE THEIR PROGRAM, AND/OR BE COMPETITIVE FOR CAREERS IN STEM-RELATED FIELDS. THE AMOUNT OF EACH SCHOLARSHIP WILL BE DETERMINED BY THE SELECTION COMMITTEE. THE MAXIMUM NUMBER OF SCHOLARSHIPS AWARDED EACH YEAR SHALL NOT EXCEED THE TOTAL AMOUNT FUNDRAISED BY STEM PREP FOR THIS PURPOSE. |
| IRS990ScheduleI/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART I, LINE 2: |
| IRS990ScheduleJ/AnyNonFixedPaymentsInd | 0 | 0 |
| IRS990ScheduleJ/BoardOrCommitteeApprovalInd | 0 | X |
| IRS990ScheduleJ/CompBasedOnRevenueOfFlngOrgInd | 0 | 0 |
| IRS990ScheduleJ/CompBsdNetEarnsFlngOrgInd | 0 | 0 |
| IRS990ScheduleJ/CompBsdNetEarnsRltdOrgsInd | 0 | 0 |
| IRS990ScheduleJ/CompBsdOnRevRelatedOrgsInd | 0 | 0 |
| IRS990ScheduleJ/CompensationSurveyInd | 0 | X |
| IRS990ScheduleJ/EquityBasedCompArrngmInd | 0 | 0 |
| IRS990ScheduleJ/InitialContractExceptionInd | 0 | 0 |
| IRS990/ScheduleJRequiredInd | 0 | 1 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BaseCompensationFilingOrgAmt | 0 | 292107 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BaseCompensationFilingOrgAmt | 1 | 136087 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BaseCompensationFilingOrgAmt | 2 | 173189 |
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