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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 GGDK9L8rEBA3fE1DMmkoYqdSdbcyqBPaElb+OCIU7159w/n1brD6+R6cbMGqRcWi
 kn8sC//45FC0pol7zy5sCQ==

<SEC-DOCUMENT>0001179110-05-017415.txt : 20050902
<SEC-HEADER>0001179110-05-017415.hdr.sgml : 20050902
<ACCEPTANCE-DATETIME>20050902132810
ACCESSION NUMBER:		0001179110-05-017415
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050902
FILED AS OF DATE:		20050902
DATE AS OF CHANGE:		20050902

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			INVESTOOLS INC
		CENTRAL INDEX KEY:			0001145124
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-EDUCATIONAL SERVICES [8200]
		IRS NUMBER:				760685039
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		5959 CORPORATE DRIVE
		STREET 2:		SUITE 2000
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77036
		BUSINESS PHONE:		2815889700

	MAIL ADDRESS:	
		STREET 1:		5959 CORPORATE DRIVE
		STREET 2:		SUITE 2000
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77036

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Kane Ida Kathleen
		CENTRAL INDEX KEY:			0001315423

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31917
		FILM NUMBER:		051067092

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		281-588-9700

	MAIL ADDRESS:	
		STREET 1:		5959 CORPORATE DRIVE, SUITE LL250
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77036
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-09-02</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001145124</issuerCik>
        <issuerName>INVESTOOLS INC</issuerName>
        <issuerTradingSymbol>IED</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001315423</rptOwnerCik>
            <rptOwnerName>Kane Ida Kathleen</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>13947 SOUTH MINUTEMAN DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DRAPER</rptOwnerCity>
            <rptOwnerState>UT</rptOwnerState>
            <rptOwnerZipCode>84020</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Sr. VP &amp; CFO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-09-02</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2005-09-02</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>5000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>4.37</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>/s/ IDA K. KANE</signatureName>
        <signatureDate>2005-09-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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