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Math Science Nucleus

  • Fremont, CA
  • Tax-exempt since Sept. 1983
  • EIN: 94-2862140

Organization summary

Type of Nonprofit

Designated as a Organizations for any of the following purposes: religious, educational, charitable, scientific, literary, testing for public safety, fostering national or international amateur sports competition (as long as it doesn't provide athletic facilities or equipment), or the prevention of cruelty to children or animals.

Category: Education N.E.C. (NTEE)

Donations to this organization are tax deductible.

Details

According to its Dec. 2024 tax filing, this nonprofit:

Reported conflict of interest transactions
Organizations must report loans, grants or business transactions with interested parties, which may include key employees and officers, their family members and any businesses in which they hold a controlling interest. These transactions must be reported on Schedule L.

Summary charts: organization finances over time

Revenue
$3.31M (2024)

Expenses
$2.08M (2024)

Total Assets
$3.1M (2024)

Total Liabilities
$0 (2024)

Source: Form 990 tax filings from 2011 to 2024

Tax Filings by Year

Form 990 is an information return that most organizations claiming federal tax-exempt status must file yearly with the IRS. Nonprofit Explorer has IRS digitized Form 990 data for filings processed in 2012 and later. If this organization filed an amended return, it may not be reflected below. Duplicate download links may indicate a resubmission or amendment to this organization's original return. Form 990 data is from the IRS.

Fiscal Year Ending Dec.
2024

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$3,309,434
Expenses
$2,076,705
Net Income
$1,232,729
Net Assets
$3,097,914
Notable Sources of Revenue Percent of Total Revenue
Contributions $3,026,778
91.5%
Program Services $264,782
8.0%
Investment Income $17,874
0.5%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $248,341
12.0%
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $3,097,914
Total Liabilities $0
Net Assets $3,097,914
Other
Reported conflict of interest transactions
Compensation
Key Employees and Officers Compensation Related Other
Hagos Tewolde Negusse (Animator Web Design) $66,560 $0 $2,888
Art Williams (Restoration Specialist) $66,560 $0 $10,046
Althea Weber (Collection Manager) $52,000 $0 $3,846
Gaetano Palazzo (Associate Paleontologist) $38,471 $0 $0
Monica Esqueda (Environmental Scientist Educator) $17,550 $0 $0
Kbrom Nugse (Restoration Aide) $3,600 $0 $0
Selamawit Tesfaldet (Associate Museum Shop) $3,600 $0 $0
Joyce R Blueford (Board President) $0 $0 $0
Debbie Davidson (Vice President Board) $0 $0 $0
Karen Anderson (Board Member) $0 $0 $0
David Stronk (Board Member) $0 $0 $0
Pat Gordon (Board Member) $0 $0 $0
Bruce Roeding (Board Member) $0 $0 $0
Ken Miller (Board Member) $0 $0 $0
+ View more people

Document Links

990
Filed on April 14, 2025

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2023

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$657,123
Expenses
$681,249
Net Income
-$24,126
Net Assets
$5,562,636
Notable Sources of Revenue Percent of Total Revenue
Contributions $271,164
41.3%
Program Services $377,457
57.4%
Investment Income $8,502
1.3%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $216,130
31.7%
Assets/Debt
Total Assets $5,562,636
Total Liabilities $0
Net Assets $5,562,636
Other
Reported conflict of interest transactions
Compensation
Key Employees and Officers Compensation Related Other
Hagos Tewolde Negusse (Animator Web Design) $62,400 $0 $3,647
Art Williams (Restoration Specialist) $62,400 $0 $4,537
Althea Weber (Collection Manager) $47,840 $0 $2,765
Monica Esqueda (Environmental Scientist Educator) $33,085 $0 $0
Gaetano Palazzo (Educator Exhibits) $4,032 $0 $0
Caleb Wills (Student Helper) $3,820 $0 $0
Stefani Himes (Educator) $2,553 $0 $0
Joyce R Blueford (Board President) $0 $0 $0
Debbie Davidson (Vice President Board) $0 $0 $0
Karen Anderson (Board Member) $0 $0 $0
David Stronk (Board Member) $0 $0 $0
Pat Gordon (Board Member) $0 $0 $0
Bruce Roeding (Board Member) $0 $0 $0
Ken Miller (Board Member) $0 $0 $0
+ View more people

Document Links

990
Filed on April 15, 2024

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2022

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$447,516
Expenses
$404,914
Net Income
$42,602
Net Assets
$5,958,000
Notable Sources of Revenue Percent of Total Revenue
Contributions $384,928
86.0%
Program Services $58,740
13.1%
Investment Income $3,848
0.9%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $122,339
30.2%
Assets/Debt
Total Assets $5,958,000
Total Liabilities $0
Net Assets $5,958,000
Other
Reported conflict of interest transactions
Compensation
Key Employees and Officers Compensation Related Other
Arthur Williams (Restoration Specialist) $45,360 $0 $0
Hagos Tewolde Negusse (Animator Web Design) $27,600 $0 $0
Althea Weber (Collection Manager) $21,600 $0 $0
Joyce R Blueford (Board President) $0 $0 $0
Debbie Davidson (Vice President Board) $0 $0 $0
Karen Anderson (Board Member) $0 $0 $0
David (Stronck) $0 $0 $0
Phil Gordon (Board Member) $0 $0 $0
Bruce Roeding (Board Member) $0 $0 $0
Ken Miller (Board Member) $0 $0 $0
+ View more people

Document Links

990
Filed on March 25, 2023

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2021

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$324,412
Expenses
$247,444
Net Income
$76,968
Net Assets
$915,398
Notable Sources of Revenue Percent of Total Revenue
Contributions $225,789
69.6%
Program Services $94,446
29.1%
Investment Income $4,177
1.3%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $70,400
28.5%
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $915,398
Total Liabilities $0
Net Assets $915,398
Other
Reported conflict of interest transactions
Compensation
Key Employees and Officers Compensation Related Other
Art Williams (Restoration Specialist) $41,600 $0 $0
Hagos Tewolde Negusse (Animator) $28,800 $0 $0
Joyce R Blueford (Board President) $0 $0 $0
Debbie Davidson (Vice President) $0 $0 $0
Karen Anderson (Member) $0 $0 $0
David Stronck (Member) $0 $0 $0
Ken Miller (Member) $0 $0 $0
Phil Gorden (Member) $0 $0 $0
Bruce Roeding (Member) $0 $0 $0
+ View more people

Document Links

990
Filed on March 31, 2022

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2020

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$317,098
Expenses
$284,098
Net Income
$33,000
Net Assets
$838,430
Notable Sources of Revenue Percent of Total Revenue
Contributions $280,519
88.5%
Program Services $25,293
8.0%
Investment Income $11,286
3.6%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $85,990
30.3%
Assets/Debt
Total Assets $838,430
Total Liabilities $0
Net Assets $838,430
Other
Reported conflict of interest transactions
Compensation
Key Employees and Officers Compensation Related Other
Arthur Williams (Restoration Specialist I) $43,680 $0 $0
Hagos Tewolde Negusse (Animator) $32,400 $0 $0
Joyce Blueford (Board President) $0 $0 $0
Debbie Davidson (Vice President) $0 $0 $0
Karen Anderson (Member) $0 $0 $0
David Stronck (Member) $0 $0 $0
James Gonzales (Member) $0 $0 $0
Bruce Roeding (Member) $0 $0 $0
+ View more people

Document Links

990
Filed on April 2, 2021

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2019

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$212,825
Expenses
$294,899
Net Income
-$82,074
Net Assets
$805,430
Notable Sources of Revenue Percent of Total Revenue
Contributions $200,796
94.3%
Program Services $0
Investment Income $12,029
5.7%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $98,046
33.2%
Professional Fundraising Fees $0
Other Salaries and Wages $35,949
12.2%
Assets/Debt
Total Assets $805,430
Total Liabilities $0
Net Assets $805,430

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF
PDF (2 of 2)

Fiscal Year Ending Dec.
2018

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$376,810
Expenses
$293,523
Net Income
$83,287
Net Assets
$723,287
Notable Sources of Revenue Percent of Total Revenue
Contributions $139,500
37.0%
Program Services $230,628
61.2%
Investment Income $6,682
1.8%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $127,300
43.4%
Professional Fundraising Fees $0
Other Salaries and Wages $8,300
2.8%
Assets/Debt
Total Assets $723,287
Total Liabilities $0
Net Assets $723,287

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2017

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$351,114
Expenses
$283,813
Net Income
$67,301
Net Assets
$440,000
Notable Sources of Revenue Percent of Total Revenue
Contributions $57,500
16.4%
Program Services $266,363
75.9%
Investment Income $4,745
1.4%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $22,506
6.4%
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $114,328
40.3%
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $440,000
Total Liabilities $0
Net Assets $440,000

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2016

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$359,274
Expenses
$269,828
Net Income
$89,446
Net Assets
$622,000
Notable Sources of Revenue Percent of Total Revenue
Contributions $12,000
3.3%
Program Services $341,787
95.1%
Investment Income $5,487
1.5%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $90,713
33.6%
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $622,000
Total Liabilities $0
Net Assets $622,000

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2015

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$369,249
Expenses
$153,118
Net Income
$216,131
Net Assets
$640,319
Notable Sources of Revenue Percent of Total Revenue
Contributions $69,866
18.9%
Program Services $290,098
78.6%
Investment Income $9,285
2.5%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $83,070
54.3%
Assets/Debt
Total Assets $640,319
Total Liabilities $0
Net Assets $640,319

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2014

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$324,898
Expenses
$249,062
Net Income
$75,836
Net Assets
$550,000
Notable Sources of Revenue Percent of Total Revenue
Contributions $71,700
22.1%
Program Services $246,668
75.9%
Investment Income $6,530
2.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $71,443
28.7%
Assets/Debt
Total Assets $550,000
Total Liabilities $0
Net Assets $550,000

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF
PDF (2 of 2)

Fiscal Year Ending Dec.
2013

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$287,224
Expenses
$210,303
Net Income
$76,921
Net Assets
$545,000
Notable Sources of Revenue Percent of Total Revenue
Contributions $82,200
28.6%
Program Services $193,685
67.4%
Investment Income $11,339
3.9%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $545,000
Total Liabilities $0
Net Assets $545,000

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2012

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$296,639
Expenses
$216,434
Net Income
$80,205
Net Assets
$555,000
Notable Sources of Revenue Percent of Total Revenue
Contributions $76,392
25.8%
Program Services $214,337
72.3%
Investment Income $5,910
2.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $555,000
Total Liabilities $0
Net Assets $555,000

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF
PDF (2 of 2)

Fiscal Year Ending Dec.
2011

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$300,684
Expenses
$211,341
Net Income
$89,343
Net Assets
$560,000
Notable Sources of Revenue Percent of Total Revenue
Contributions $79,900
26.6%
Program Services $218,663
72.7%
Investment Income $2,121
0.7%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $52,986
25.1%
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $560,000
Total Liabilities $0
Net Assets $560,000

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF
PDF (2 of 2)

Fiscal Year Ending Dec.
2010

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF
PDF (2 of 2)

Fiscal Year Ending Dec.
2009

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF
PDF (2 of 2)

Fiscal Year Ending Dec.
2008

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2007

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2006

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF
PDF (2 of 2)

Fiscal Year Ending Dec.
2005

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2003

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2002

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2001

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

About This Data

What Is This Data?

Nonprofit Explorer includes summary data for nonprofit tax returns and full Form 990 documents, in both PDF and digital formats.

The summary data contains information processed by the IRS during the 2012-2019 calendar years; this generally consists of filings for the 2011-2018 fiscal years, but may include older records. This data release includes only a subset of what can be found in the full Form 990s.

In addition to the raw summary data, we link to PDFs and digital copies of full Form 990 documents wherever possible. This consists of separate releases by the IRS of Form 990 documents processed by the agency, which we update regularly.

We also link to copies of audits nonprofit organizations that spent $750,000 or more in Federal grant money in a single fiscal year since 2016. These audits are copied from the Federal Audit Clearinghouse.

Which Organizations Are Here?

Every organization that has been recognized as tax exempt by the IRS has to file Form 990 every year, unless they make less than $200,000 in revenue and have less than $500,000 in assets, in which case they have to file form 990-EZ. Organizations making less than $50,000 don’t have to file either form but do have to let the IRS they’re still in business via a Form 990N "e-Postcard."

Nonprofit Explorer has organizations claiming tax exemption in each of the 27 subsections of the 501(c) section of the tax code, and which have filed a Form 990, Form 990EZ or Form 990PF. Taxable trusts and private foundations that are required to file a form 990PF are also included. Small organizations filing a Form 990N "e-Postcard" are not included in this data.

Types of Nonprofits

There are 27 nonprofit designations based on the numbered subsections of section 501(c) of the tax code. See the list »

Get the Data

For those interested in acquiring the original data from the source, here’s where our data comes from:

  • Raw filing data. Includes EINs and summary financials as structured data.
  • Exempt Organization profiles. Includes organization names, addresses, etc. You can merge this with the raw filing data using EIN numbers.
  • Form 990 documents. Prior to 2017, these documents were obtained and processed by Public.Resource.org and ProPublica. Bulk PDF downloads since 2017 are available from the IRS.
  • Form 990 documents as XML files. Includes complete filing data (financial details, names of officers, tax schedules, etc.) in machine-readable format. Only available for electronically filed documents. Electronic data released prior to October 2021 is also available through Amazon Web Services.
  • Audits. PDFs of single or program-specific audits for nonprofit organizations that spent $750,000 or more in Federal grant money in a single fiscal year. Available for fiscal year 2015 and later.

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About Nonprofit Explorer

Nonprofit Explorer

Browse millions of annual returns filed by tax-exempt organizations with ProPublica’s Nonprofit Explorer. See details like executive compensation, revenue, expenses and more. Search for an organization or a person, or search the full text of filings.

By Andrea Suozzo, Alec Glassford, Ash Ngu and Brandon Roberts.

Design by Jeff Frankl. Additional development by Ken Schwencke, Mike Tigas, and Sisi Wei.

E-file viewer adapted from IRS e-File Viewer by Ben Getson. Code for scraping audit documents adapated from Govwiki.

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