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        <BookValueAmt>1287246</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
      </OtherSecuritiesGrp>
      <TotalBookValueSecuritiesAmt>2496623</TotalBookValueSecuritiesAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>CAPITAL LEASE</Desc>
        <Amt>12600</Amt>
      </OtherLiabilitiesOrgGrp>
      <OtherLiabilitiesOrgGrp>
        <Desc>ACCRUED POST-RETIREMENT BENEFIT OBLIGATION</Desc>
        <Amt>465295</Amt>
      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>477895</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>5942041</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>108082</NetUnrealizedGainsInvstAmt>
      <RevenueNotReportedAmt>108082</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>5833959</RevenueSubtotalAmt>
      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>5833959</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>4994213</TotExpnsEtcAuditedFinclStmtAmt>
      <ExpensesNotReportedAmt>0</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>4994213</ExpensesSubtotalAmt>
      <ExpensesNotRptFinclStmtAmt>0</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>4994213</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ASSOCIATION CLASSIFIES AS PERMANENTLY RESTRICTED NET ASSETS (A) THE ORIGINAL VALUE OF GIFTS DONATED TO THE PERMANENT ENDOWMENT, (B) THE ORIGINAL VALUE OF SUBSEQUENT GIFTS TO THE PERMANENT ENDOWMENT, AND (C) ACCUMULATIONS TO THE PERMANENT ENDOWMENT MADE IN ACCORDANCE WITH THE DIRECTION OF THE APPLICABLE DONOR GIFT INSTRUMENT AT THE TIME THE ACCUMULATION IS ADDED TO THE FUND. THE REMAINING PORTION OF THE DONOR-RESTRICTED ENDOWMENT FUND THAT IS NOT CLASSIFIED IN PERMANENTLY RESTRICTED NET ASSETS IS CLASSIFIED AS TEMPORARILY RESTRICTED NET ASSETS, UNTIL THOSE AMOUNTS ARE APPROPRIATED FOR EXPENDITURES BY THE ASSOCIATION IN A MANNER CONSISTENT WITH THE STANDARD OF PRUDENCE PRESCRIBED BY UPMIFA. BOARD DESIGNATED NET ASSETS AT DECEMBER 31, 2013 AND 2012, WITH EXECUTIVE BOARD APPROVAL, ARE AVAILABLE FOR THE FOLLOWING PURPOSES: TO SUPPORT SPECIAL ACTIVITIES IN THE AREA OF PHYSICS TEACHING, TO SUPPORT THE ADVANCEMENT OF PHYSICS EDUCATION AND OTHER PURPOSE RESTRICTION PROGRAMS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ASSOCIATION IS GENERALLY EXEMPT FROM FEDERAL INCOME TAXES UNDER THE PROVISIONS OF SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE. UNDER CURRENT INTERNAL REVENUE SERVICE (IRS) REGULATIONS, ADVERTISING AND OTHER NON-EXEMPT REVENUE EARNED IS SUBJECT TO UNRELATED BUSINESS INCOME TAX. FOR THE YEARS ENDED DECEMBER 31, 2014 AND 2013, THE ASSOCIATION HAD NO NET UNRELATED BUSINESS INCOME. THE ASSOCIATION FOLLOWS THE ACCOUNTING STANDARD ON ACCOUNTING FOR UNCERTAINTY IN INCOME TAXES, WHICH ADDRESSES THE DETERMINATION OF WHETHER TAX BENEFITS CLAIMED OR EXPECTED TO BE CLAIMED ON A TAX RETURN SHOULD BE RECORDED IN THE FINANCIAL STATEMENTS. UNDER THIS GUIDANCE, THE ASSOCIATION MAY RECOGNIZE THE TAX BENEFIT FROM AN UNCERTAIN TAX POSITION ONLY IF IT IS MORE LIKELY THAN NOT THAT THE TAX POSITION WILL BE SUSTAINED ON EXAMINATION BY TAXING AUTHORITIES, BASED ON THE TECHNICAL MERITS OF THE POSITION. THE TAX BENEFITS RECOGNIZED IN THE FINANCIAL STATEMENTS FROM SUCH A POSITION ARE MEASURED BASED ON THE LARGEST BENEFIT THAT HAS A GREATER THAN 50% LIKELIHOOD OF BEING REALIZED UPON ULTIMATE SETTLEMENT. THE GUIDANCE ON ACCOUNTING FOR UNCERTAINTY IN INCOME TAXES ALSO ADDRESSES DE-RECOGNITION, CLASSIFICATION, INTEREST AND PENALTIES ON INCOME TAXES, AND ACCOUNTING IN INTERIM PERIODS. THE ASSOCIATION HAD NO SUCH POSITIONS RECORDED IN THE FINANCIAL STATEMENTS AT DECEMBER 31, 2014 AND 2013. GENERALLY, THE ASSOCIATION IS NO LONGER SUBJECT TO U.S. FEDERAL INCOME TAX POSITIONS BY TAX AUTHORITIES FOR YEARS BEFORE 2011.</ExplanationTxt>
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    </IRS990ScheduleD>
    <IRS990ScheduleI documentId="RetDoc1041900001">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>2014 LOTZE SCHLORSHIP</GrantTypeTxt>
        <RecipientCnt>6</RecipientCnt>
        <CashGrantAmt>12000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>2014 KLOPSTEG AWARD</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>3000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>2014 EXCELL IN PRE COLLEGE PAUL ZITZEWITZ AWARD</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>3000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>2014 EXCELLENCE IN PHYSICS EDUCATION AWARD</GrantTypeTxt>
        <RecipientCnt>2</RecipientCnt>
        <CashGrantAmt>3000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>2014 MILIKAN AWARD</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>3000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>2014 RICHTMYER MEMORIAL AWARD</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>3000</CashGrantAmt>
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      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>AAPT/APS PRIZE</GrantTypeTxt>
        <RecipientCnt>4</RecipientCnt>
        <CashGrantAmt>2500</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>STUDENT FUND AND OTHER</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>125</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>AAPT LABEL DESIGN &amp; PRODUCTION, PER AWARD CONFERENCE</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>840</CashGrantAmt>
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      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>HS PHYSICS TEACHERS GRANT</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>500</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>2014 HIGH SCHOOL PHOTO CONTEST 2ND PLACE</GrantTypeTxt>
        <RecipientCnt>6</RecipientCnt>
        <CashGrantAmt>450</CashGrantAmt>
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        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>IT IS THE GOAL OF THE AAPT TO ENCOURAGE HIGH SCHOOL TEACHERS TO EXPERIMENT AND IMPROVE ON THEIR TEACHING PRACTICES. IT IS OUR BELIEF THAT AS TEACHING PRACTICE IMPROVES, THEN PHYSICS ENROLLMENT AND EXCITEMENT AMONG STUDENTS INCREASE. AS A RESULT, WE OFFER THE HIGH SCHOOL PHYSICS TEACHER GRANT. WE HOPE THAT THIS GRANT CAN PROVIDE THE FUNDS TO KICK START THE IMPLEMENTATION OF THESE PRACTICES. THE GRANT(S) ARE GIVEN EACH YEAR TO TEACHERS WHOSE PROPOSAL MEETS THE GOAL OF THE GRANT. THAT IS, THE PROCEDURE SHOULD RESULT IN BETTER TEACHING PRACTICE, STUDENT UNDERSTANDING AND INTEREST, AND/OR INCREASED ENROLLMENT. ALSO, THE PROPOSAL SHOULD CONTAIN SOME INNOVATIVE IDEAS. FOR EXAMPLE, THE PROPOSAL MAY USE A NEW TEACHING METHOD OR AN ADAPTATION OF AN EXISTING IDEA. THE AAPT EXECUTIVE BOARD OFFERS SCHOLARSHIPS FOR FUTURE HIGH SCHOOL PHYSICS TEACHERS. THESE SCHOLARSHIPS, SUPPORTED BY AN ENDOWMENT FUNDED BY BARBARA LOTZE, ARE AVAILABLE ONLY TO U.S. CITIZENS ATTENDING U.S. SCHOOLS. UNDERGRADUATE STUDENTS ENROLLED, OR PLANNING TO ENROLL, IN PHYSICS TEACHER PREPARATION CURRICULA AND HIGH SCHOOL SENIORS ENTERING SUCH PROGRAMS ARE ELIGIBLE. SUCCESSFUL APPLICANTS RECEIVE A STIPEND OF UP TO $2,000. THE SCHOLARSHIP MAY BE GRANTED TO AN INDIVIDUAL FOR EACH OF FOUR YEARS. APPLICATIONS WILL BE ACCEPTED AT ANY TIME AND WILL BE CONSIDERED FOR RECOMMENDATION TO THE EXECUTIVE BOARD AT EACH AAPT WINTER MEETING. ALL APPLICATIONS IN WHICH ALL MATERIALS, INCLUDING LETTERS OF RECOMMENDATION, ARE RECEIVED BY DECEMBER 1 WILL BE CONSIDERED FOR RECOMMENDATION AT THE WINTER MEETING OF THE AAPT EXECUTIVE BOARD.</ExplanationTxt>
      </SupplementalInformationDetail>
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      <IndependentConsultantInd>X</IndependentConsultantInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
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        <PersonNm>DR BETH A CUNNINGHAM</PersonNm>
        <TitleTxt>EXECUTIVE OFFICER</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>17367</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>19048</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>229378</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MEMBERSHIP OF THE ASSOCIATION IS MADE UP OF FOUR YEAR UNIVERSITY/COLLEGE AND TWO YEAR COLLEGE PROFESSORS AND EDUCATORS OF THE PHYSICS SCIENCES IN THE UNITED STATES AND INTERNATIONALLY. THE MEMBERSHIP ALSO INCLUDES HIGH SCHOOL EDUCATORS, STUDENTS OF PHYSICS/SCIENCES AND RETIRED MEMBERS IN THE UNITED STATES AND INTERNATIONALLY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE NOMINATION COMMITTEE WILL NOMINATE MEMBERS OF THE GOVERNING BODY WHO THEN ARE ELECTED BY THE GENERAL MEMBERSHIP BY BALLOT.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 WILL BE POSTED ON THE BOARD WEB SITE AND INFORMED BY E-MAIL. THE BOARD MEMBER IS ASKED TO INQUIRE, REVIEW AND ASK QUESTIONS RELATED TO THE TAX RETURN. AFTER ALL BOARD ISSUES HAVE BEEN RESPONDED TO THE 990 TAX RETURN WILL BE FILED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE GOVERNING BODY IS REQUIRED TO RESPOND ELECTRONICALLY TO THE CONFLICT OF INTEREST QUESTIONNAIRE ON A YEARLY BASIS. ALL NEW EXECUTIVE BOARD MEMBERS MUST SUBMIT A CONFLICT OF INTEREST STATEMENT PRIOR THE MEMBER START DATE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COMPENSATION COMMITTEE REVIEWS COMPENSATION OF THE EXECUTIVE OFFICER AND KEY EMPLOYEES USING COMPARABLE DATA OF SIMILAR SIZE NONPROFIT ORGANIZATIONS, USING PUBLISHED SALARY GUIDES. THE COMPENSATION DISCUSSIONS ARE ALSO HELD BY THE ENTIRE BOARD. THEY ARE RECORDED IN EXECUTIVE SESSION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE DOCUMENTS ARE POSTED ON THE ORGANIZATION'S WEBSITE AND PROVIDED COPIES ON REQUEST; INSPECTIONS ARE AVAILABLE AT THE ASSOCIATION'S NATIONAL OFFICE BY APPOINTMENT. THE DOCUMENTS ARE AVAILABLE FOR THE SAME PERIOD OF DISCLOSURE AS SET FORTH IN SECTION 6104(D).</ExplanationTxt>
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        <DisregardedEntityName>
          <BusinessNameLine1Txt>AMERICAN CENTER FOR PHYSICS</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>1 PHYSICS ELLIPSE</AddressLine1Txt>
          <CityNm>COLLEGE PARK</CityNm>
          <StateAbbreviationCd>MD</StateAbbreviationCd>
          <ZIPCd>20740</ZIPCd>
        </USAddress>
        <EIN>521712905</EIN>
        <PrimaryActivitiesTxt>OPERATION OF FACILITY - NATIONAL CENTER OF PHYSICS</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MD</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>LINE 11B, II</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
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      <GiftGrntCapContriFromOthOrgInd>0</GiftGrntCapContriFromOthOrgInd>
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      <AssetExchangeInd>0</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>1</RentalOfFacilitiesToOthOrgInd>
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          <BusinessNameLine1Txt>AMERICAN CENTER FOR PHYSICS INC</BusinessNameLine1Txt>
        </OtherOrganizationName>
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        <MethodOfAmountDeterminationTxt>COST</MethodOfAmountDeterminationTxt>
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