UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                  SCHEDULE 13G

                    UNDER THE SECURITIES EXCHANGE ACT OF 1934

                                AMENDMENT NO. 4*

                         ITT EDUCATIONAL SERVICES, INC.
                                (Name of Issuer)

                                  COMMON STOCK
                         (Title of Class of Securities)

                                    45068B109
                                 (CUSIP Number)

                                DECEMBER 31, 2003
             (Date of Event Which Requires Filing of this Statement)


CHECK THE APPROPRIATE BOX TO DESIGNATE THE RULE PURSUANT TO WHICH THIS SCHEDULE
IS FILED:

                                [X] RULE 13d-1(b)
                                [ ] RULE 13d-1(c)
                                [ ] RULE 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).




CUSIP No. 45068B109                  13G

 1.  NAME OF REPORTING PERSON (S.S. or I.R.S. Identification No. of Above
     Person)

     Waddell & Reed Investment Management Company  Tax ID No. 48-1106973

 2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:

     (a)    [ ]
     (b)    [ ]

 3.  SEC USE ONLY

 4.  CITIZENSHIP OR PLACE OF ORGANIZATION:  Kansas

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

     5.  SOLE VOTING POWER         899,166  (See Item 4)

     6.  SHARED VOTING POWER             0

     7.  SOLE DISPOSITIVE POWER    899,166  (See Item 4)

     8.  SHARED DISPOSITIVE POWER        0

 9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON:
         899,166  (See Item 4)

10.  CHECK IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES:
         [ ]

11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9:  2%

12.  TYPE OF PERSON REPORTING: IA



CUSIP No. 45068B109                  13G

 1.  NAME OF REPORTING PERSON (S.S. or I.R.S. Identification No. of Above
     Person)

     Waddell & Reed, Inc.  Tax ID No. 43-1235675

 2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:

     (a)    [ ]
     (b)    [ ]

 3.  SEC USE ONLY

 4.  CITIZENSHIP OR PLACE OF ORGANIZATION:  Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

     5.  SOLE VOTING POWER             899,166  (See Item 4)

     6.  SHARED VOTING POWER           0

     7.  SOLE DISPOSITIVE POWER        899,166  (See Item 4)

     8.  SHARED DISPOSITIVE POWER      0

 9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON:
         899,166  (See Item 4)

10.  CHECK IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES:
         [ ]

11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9:  2%

12.  TYPE OF PERSON REPORTING: BD



CUSIP No. 45068B109                  13G

 1.  NAME OF REPORTING PERSON (S.S. or I.R.S. Identification No. of Above
     Person)

     Waddell & Reed Financial Services, Inc.  Tax ID No. 43-1414157

 2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:

     (a)    [ ]
     (b)    [ ]

 3.  SEC USE ONLY

 4.  CITIZENSHIP OR PLACE OF ORGANIZATION: Missouri

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

     5.  SOLE VOTING POWER         899,166  (See Item 4)

     6.  SHARED VOTING POWER             0

     7.  SOLE DISPOSITIVE POWER    899,166  (See Item 4)

     8.  SHARED DISPOSITIVE POWER        0

 9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON:
         899,166  (See Item 4)

10.  CHECK IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES:
         [ ]

11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9:  2%

12.  TYPE OF PERSON REPORTING:  HC



CUSIP No. 45068B109                  13G

 1.  NAME OF REPORTING PERSON (S.S. or I.R.S. Identification No. of Above
     Person)

     Waddell & Reed Financial, Inc.  Tax ID No. 51-0261715

 2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:

     (a)    [ ]
     (b)    [ ]

 3.  SEC USE ONLY

 4.  CITIZENSHIP OR PLACE OF ORGANIZATION:  Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

     5.  SOLE VOTING POWER         899,166   (See Item 4)

     6.  SHARED VOTING POWER             0

     7.  SOLE DISPOSITIVE POWER    899,166   (See Item 4)

     8.  SHARED DISPOSITIVE POWER        0

 9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON:
         899,166   (See Item 4)

10.  CHECK IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES:
         [ ]

11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9:  2%

12.  TYPE OF PERSON REPORTING: HC



ITEM 1(a):   NAME OF ISSUER:  ITT Educational Services, Inc.

ITEM 1(b):   ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

             5975 Castle Creek Parkway N Drive
             P.O. Box 50466
             Indianapolis, IN  46250


ITEM 2(a):   NAME OF PERSON FILING:

             (i)      Waddell & Reed Financial, Inc.
             (ii)     Waddell & Reed Financial Services, Inc.
             (iii)    Waddell & Reed, Inc.
             (iv)     Waddell & Reed Investment Management Company

ITEM 2(b):   ADDRESS OF PRINCIPAL BUSINESS OFFICE:

             (i)-(v):       6300 Lamar Avenue
                            Overland Park, KS  66202

ITEM 2(c):   CITIZENSHIP:

             (i), (iii): Delaware
             (ii):  Missouri
             (iv):  Kansas

ITEM 2(d):   TITLE OF CLASS OF SECURITIES: Common Stock

ITEM 2(e):   CUSIP NUMBER: 45068B109

ITEM 3:      The reporting person is:

             (i)   Waddell & Reed Financial, Inc., a parent holding company in
                   accordance with Reg. 240.13d-1(b)(1)(ii)(G);
             (ii)  Waddell & Reed Financial Services, Inc., a parent holding
                   company in accordance with Reg. 240.13d-1(b)(1)(ii)(G);
             (iii) Waddell & Reed, Inc., a broker-dealer in accordance with Reg.
                   240.13d-1(b)(1)(ii)(A); and
             (iv)  Waddell & Reed Investment Management Company, an investment
                   advisor in accordance with Reg. 240.13d-1(b)(1)(ii)(E).




ITEM 4:      OWNERSHIP

             The securities reported on herein are beneficially owned by one or
more open-end investment companies or other managed accounts which are advised
or sub-advised by Waddell & Reed Ivy Investment Company ("WRIICO"), an
investment advisory subsidiary of Waddell & Reed Financial, Inc. ("WDR") or
Waddell & Reed Investment Management Company ("WRIMCO"), an investment advisory
subsidiary of Waddell & Reed, Inc. ("WRI"). WRI is a broker-dealer and
underwriting subsidiary of Waddell & Reed Financial Services, Inc., a parent
holding company ("WRFSI"). In turn, WRFSI is a subsidiary of WDR, a publicly
traded company. The investment advisory contracts grant WRIICO and WRIMCO all
investment and/or voting power over securities owned by such advisory clients.
The investment sub-advisory contracts grant WRIICO and WRIMCO investment power
over securities owned by such sub-advisory clients and, in most cases, voting
power. Any investment restriction of a sub-advisory contract does not restrict
investment discretion or power in a material manner. Therefore, WRIICO and/or
WRIMCO may be deemed the beneficial owner of the securities covered by this
statement under Rule 13d-3 of the Securities Exchange Act of 1934 (the "1934
Act").

             WRIICO, WRIMCO, WRI, WRFSI and WDR are of the view that they are
not acting as a "group" for purposes of Section 13(d) under the 1934 Act.
Indirect "beneficial ownership" is attributed to the respective parent companies
solely because of the parent companies' control relationship to WRIMCO.

            (a) Amount beneficially owned: 899,166

            (b) Percent of class: 2%

            (c) Number of shares as to which the person has:

                (i) Sole voting power to vote or to direct the vote:

                     WDR:  899,166 (indirect)
                     WRFSI:  899,166 (indirect)
                     WRI:  899,166 (indirect)
                     WRIMCO:  899,166 (direct)

               (ii)  Shared power to vote or to direct the vote: 0

               (iii) Sole power to dispose or to direct the disposition of:

                     WDR:  899,166 (indirect)
                     WRFSI:  899,166 (indirect)
                     WRI:  899,166 (indirect)
                     WRIMCO:  899,166 (direct)

                (iv)  Shared power to dispose or to direct the disposition of: 0

ITEM 5:      OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS:

             If this statement is being filed to report the fact that as of the
date hereof the reporting person has ceased to be the beneficial owner of more
than 5 percent of the class of securities, check the following: [X]




ITEM 6:      OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON:

             The clients of WRIICO and WRIMCO, including investment companies
registered under the Investment Company Act of 1940 and other managed accounts,
have the right to receive dividends from as well as the proceeds from the sale
of such securities.

ITEM 7:      IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED
             THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY:

             See Attached Exhibit 2.

ITEM 8:      IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP:

             Not Applicable.

ITEM 9:      NOTICE OF DISSOLUTION OF GROUP:

             Not Applicable.



Item 10:     Certification:

             By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were acquired and are held in the
ordinary course of business and were not acquired and are not held for the
purpose of or with the effect of changing or influencing the control of the
issuer of the securities and were not acquired and are not held in connection
with or as a participant in any transaction having that purpose or effect.

                                    SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Dated: January 30, 2004


                                 

Waddell & Reed Financial, Inc.      Waddell & Reed Financial Services, Inc.

By: /s/ Daniel C. Schulte           By: /s/ Wendy J. Hills

Name:   Daniel C. Schulte           Name:   Wendy J. Hills
Title:  Vice President              Title:  Attorney-In-Fact


Waddell & Reed, Inc.                Waddell & Reed Investment Management Company

By:  /s/ Wendy J. Hills             By: /s/ Wendy J. Hills

Name:    Wendy J. Hills             Name:   Wendy J. Hills
Title:   Attorney-In-Fact           Title:  Attorney-In-Fact







                                  EXHIBIT INDEX


 Exhibit
   No.      Description
        

    1       Joint Filing Agreement

    2       Identification and Classification of the Subsidiary Which Acquired
            the Security Being Reported on by the Parent Holding Company

    3       Power of Attorney