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      <OtherRevenueAmt>-20979</OtherRevenueAmt>
      <RevenueNotReportedAmt>162688</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>1400615</RevenueSubtotalAmt>
      <TotalRevenuePerForm990Amt>1400615</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>1546857</TotExpnsEtcAuditedFinclStmtAmt>
      <ExpensesSubtotalAmt>1546857</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>20979</InvestmentExpensesNotIncld2Amt>
      <ExpensesNotRptFinclStmtAmt>20979</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>1567836</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part V, Line 4: Intended uses of the endowment fund.</FormAndLineReferenceDesc>
        <ExplanationTxt>Each year, the Organization is authorized to withdraw up to 4% of the average balance of the stock and securities portfolio investment account over the prior five years. Market value to be determined as of the last business day of the preceding year for the organization's operating purposes. The dollar amount and timing of any distributions from the investment account will be left up to the discretion of the Executive Director and the Treasurer. The Organization may request additional spending on an as needed basis to add to the general funds available for possible new initiatives.</ExplanationTxt>
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      <IndependentConsultantInd>X</IndependentConsultantInd>
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        <PersonNm>Ann Reid</PersonNm>
        <TitleTxt>Executive Dir.</TitleTxt>
        <BaseCompensationFilingOrgAmt>160184</BaseCompensationFilingOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>16800</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>176984</TotalCompensationFilingOrgAmt>
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        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>5</ContributionCnt>
        <NoncashContributionsRptF990Amt>53373</NoncashContributionsRptF990Amt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part III, Line 3</FormAndLineReferenceDesc>
        <ExplanationTxt>In 2023, NCSE discontinued sending Reports of the National Center for Science Education via mail and created and distributed only a digital version. NCSE also hired a new Executive Director, Amanda L. Townley, who began in the position at the end of the year.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part III, Line 4d</FormAndLineReferenceDesc>
        <ExplanationTxt>OTHER PROGRAM SERVICES 4: Investigating Science Education: In 2023, the Investigating Science Education program continued to analyze data from a 2019 nationally representative survey of public school science educators, publishing an article on the preparation of high school educators to teach evolution and preparing an article on changes in climate change education at the middle school level for submission to a peer-reviewed academic journal. The program also drafted, tested, and revised the questionnaire for a nationally representative survey of public school science educators addressing not only evolution and climate change but also the nature of science. In 2023, our core programs continued to work towards fulfilling our mission of ensuring an accurate and effective evolution and climate science education for all students in the nation.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>The 990 is reviewed first by the Finance committee and then sent out with any accompanying notes to the full board members to also review.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Each Board member signs an annual confict of interest statement that would document any conflicts.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 15a</FormAndLineReferenceDesc>
        <ExplanationTxt>Research was done by contacting other similar organization in the Bay area to discuss ED salaries. A independent survey was also used, that compares salary data from other non-profits. This process last occurred in 2022.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>NCSE makes its governing documents, conflict of interest policy and financial statements available upon request. The organization makes its completed 990 form available upon request and uploads it onto, GuideStar, on the NCSE website and Charity Navigator websites.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part III, Line 4a - Program Service Accomplishments</FormAndLineReferenceDesc>
        <ExplanationTxt>Cont'd from page 2 In addition, the program continued to send its monthly educator newsletter with resources and other items of interest to more than 6,000 subscribers.</ExplanationTxt>
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