Form 990 for the fiscal year ending December 2023 (IRS tax year 2023).
Status and standing
Where the money goes
Statement of Functional Expenses
Financial health
Summary of the Filing
Balance Sheet
Statement of Revenue
Financial Metrics
Same NTEE category, revenue band, and state where available. Descriptive — not a grade.
| Metric | This org | Peer median | Percentile |
|---|---|---|---|
| Program ratio | 84% | — | — |
| Overhead ratio | 16% | — | — |
| Fundraising cost ratio | 0% | — | — |
| Revenue growth | 47% | — | — |
| Investment management fee ratio | 0% | — | — |
| Legal fee ratio | 0% | — | — |
| Accounting fee ratio | 0% | — | — |
| Fundraising fee ratio | 0% | — | — |
Straight from the Form 990 — descriptive, not an evaluation. A ratio is hidden when its base is zero or too small to be meaningful; the dollars are always shown.
Leadership and pay
Officers, Directors & Key Employees
Hagos Tewolde Negusse’s $83K as Animator Web Design is at the 21st percentile of top reported officer pay among 3395 $1–10M education nonprofits. Peer set: organizations in the same NTEE major field of work and revenue-size band, compared on each org’s own highest-paid officer/key-employee, from Form 990 Part VII / 990-PF Part VIII. Descriptive placement, not a verdict on whether the pay is appropriate.
Compensation history total reportable pay by year · 8 named individuals · Part VII
| Name | FY2025 | FY2024 | FY2023 | FY2022 | FY2021 | FY2020 |
|---|---|---|---|---|---|---|
| Hagos Tewolde Negusse | $83,200 | $66,560 | $62,400 | $27,600 | $28,800 | $32,400 |
| Art Williams | $83,200 | $66,560 | $62,400 | — | $41,600 | — |
| Althea Weber | $56,160 | $52,000 | $47,840 | $21,600 | — | — |
| Arthur Williams | — | — | — | $45,360 | — | $43,680 |
| Gaetano Palazzo | $25,623 | $38,471 | $4,032 | — | — | — |
| Monica Esqueda | $11,610 | $17,550 | $33,085 | — | — | — |
| Susana Esqueda | $26,641 | — | — | — | — | — |
| Selamawit Tesfaldet | $22,790 | $3,600 | — | — | — | — |
Total reportable compensation (Form 990 Part VII column D / Schedule J column E) by filing year, matched by name within this organization. The Schedule J base / bonus / deferred breakdown is not parsed into this dataset.
See Math-Science Nucleus executive salaries →Are you one of these people? Claim this org to confirm your role
Governance & Policies
Mission and programs
Offers free online science and math curriculum, plus environmental field trips and museum access.
This section is blank until Math-Science Nucleus claims this page.
Know this organization? Claim it to add your story
Where the work happens
Manage and provide exhibits at Children's Natural History Museum and California Nursery Office Museum including signage and research on materials; collection of fossils at CNHM resumed field trips after pandemic at all of our locations including Children's Natural History Museum and Earthquake Exhibit.
virtual classes streaming from North Carolina to California schools; design of products for Eritrean children put on website updating Integrating Science Math and Technology Reference Curriculum online includes classes and educational services
Includes tours community service and environmental projects at Tule Ponds at Tyson Lagoon; develop signs for California Nursery Historical Park in Fremont; Visions program in Union City worked with children in Union City and reforestation program at Masonic Home including composting; educating community on environment
Run this program? Claim this org to tell your story
Funders
From grant filings on record. Receipts are incomplete: individual donors are never listed.
Grants
Filing history
| Year | Revenue | Expenses | Change | Filing |
|---|---|---|---|---|
| FY2025 Latest | $1.8M | $2.1M | -47% | 990 PDF |
| FY2024 | $3.3M | $2.1M | +404% | 990 PDF |
| FY2023 Viewing | $657K | $681K | +47% | 990 PDF |
| FY2022 | $448K | $405K | +38% | 990 PDF |
| FY2021 | $324K | $247K | +2% | 990 PDF |
| FY2020 | $317K | $284K | 990 PDF |
Want to add your own materials alongside these filings? Claim this org
Schedules filed Part IV
Not shown yet: ratings, outcomes, and peer benchmarks. A Form 990 doesn’t report them.
Similar organizations you could support
Run this organization? Claim this page
Compare
Sources
Names, privacy, and removal requests More
The names, titles, and compensation shown on this page are reproduced from IRS Form 990 filings, which are public records.
Philanthropy.org does not alter the content of those filings. All information appears exactly as reported by the filing organization for the tax year shown.
We publish only information contained in the public IRS filing — and less than the filing contains. Our profile pages do not display street addresses, telephone numbers, personal email addresses, or other personal contact information, even where the filing includes them.
Many people share the same name. A name shown on this page reflects only what one organization reported in one IRS filing for one tax year. It should not be interpreted as identifying any other individual with the same or a similar name.
If you are no longer affiliated with the organization, your name will generally stop appearing in future IRS filings once the organization no longer reports you. Pages for tax years in which you were reported remain published because those filings remain part of the public record.
Philanthropy.org does not alter or remove IRS filing records. Removing a page from this website would not remove the underlying IRS filing, which remains publicly available from the IRS and other publishers of the same information.
If you believe the IRS filing itself is inaccurate, corrections must be made by the filing organization or the IRS directly.
If you ARE the filing organization, claim this org and add context
Made it to the end? Claim this organization