UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13G
                                 (Rule 13d-102)

                    Under the Securities Exchange Act of 1934

                                (Amendment No. 1)

                                 Lightspan, Inc.
                                (Name of Issuer)

                                  Common Stock
                         (Title of Class of Securities)

                                   53226T 10 3
                                 (CUSIP Number)

                                December 31, 2001
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

     [ ]  Rule 13d-1(b)
     [ ]  Rule 13d-1(c)
     [X]  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 in 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. 53226T 10 3                                          Page 2 of 7 Pages


--------------------------------------------------------------------------------
1    NAMES OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

     Liberty Media Corporation
--------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

     (a)  [ ]
     (b)  [ ]
--------------------------------------------------------------------------------
3    SEC USE ONLY

--------------------------------------------------------------------------------
4    CITIZENSHIP OR PLACE OF ORGANIZATION

     Delaware
--------------------------------------------------------------------------------
                              5    SOLE VOTING POWER
     NUMBER OF                     4,071,075 (1)
SHARES BENEFICIALLY           --------------------------------------------------
     OWNED BY                 6    SHARED VOTING POWER
  EACH REPORTING                   0
      PERSON                  --------------------------------------------------
       WITH                   7    SOLE DISPOSITIVE POWER
                                   4,071,075 (1)
                              --------------------------------------------------
                              8    SHARED DISPOSITIVE POWER
                                   0
--------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     4,071,075 (1)
--------------------------------------------------------------------------------
10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

                                                                             [ ]
--------------------------------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

     8.75%
--------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON*

     CO
--------------------------------------------------------------------------------

-----------------
(1)  Includes 11,773 shares which the reporting person has the right to acquire,
     as described in Item 4.


CUSIP NO. 53226T 10 3                                          Page 3 of 7 Pages


--------------------------------------------------------------------------------
1    NAMES OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

     Liberty Digital, Inc.
--------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

     (a)  [ ]
     (b)  [ ]
--------------------------------------------------------------------------------
3    SEC USE ONLY

--------------------------------------------------------------------------------
4    CITIZENSHIP OR PLACE OF ORGANIZATION

     Delaware
--------------------------------------------------------------------------------
                              5    SOLE VOTING POWER
     NUMBER OF                     4,071,075 (1)
SHARES BENEFICIALLY           --------------------------------------------------
     OWNED BY                 6    SHARED VOTING POWER
  EACH REPORTING                   0
      PERSON                  --------------------------------------------------
       WITH                   7    SOLE DISPOSITIVE POWER
                                   4,071,075 (1)
                              --------------------------------------------------
                              8    SHARED DISPOSITIVE POWER
                                   0
--------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     4,071,075 (1)
--------------------------------------------------------------------------------
10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

                                                                             [ ]
--------------------------------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

     8.75%
--------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON*

     CO
--------------------------------------------------------------------------------

-----------------
(1)  Includes 11,773 shares which the reporting person has the right to acquire,
     as described in Item 4.



CUSIP NO. 53226T 10 3                                          Page 4 of 7 Pages


ITEM 1.

     Item 1(a)(1) NAME OF ISSUER:               Lightspan, Inc.

     Item 1(b)(1) ADDRESS OF ISSUER'S
                  PRINCIPAL EXECUTIVE           10140 Campus Point Drive
                    OFFICES                     San Diego, California 92121-1520

ITEM 2.

     Item 2(a)(1) NAME OF PERSON FILING:        Liberty Media Corporation

     Item 2(b)(1) ADDRESS OF PRINCIPAL
                  BUSINESS OFFICE OR, IF NONE
                  RESIDENCE:                    12300 Liberty Boulevard
                                                Englewood, Colorado 80112

     Item 2(c)(1) CITIZENSHIP:                  Delaware

     Item 2(a)(2) NAME OF PERSON FILING:        Liberty Digital, Inc.

     Item 2(b)(2) ADDRESS OF PRINCIPAL
                  BUSINESS OFFICE OR, IF NONE
                  RESIDENCE:                    1100 Glendon Avenue
                                                Los Angeles, California 90024

     Item 2(c)(2) CITIZENSHIP:                  Delaware

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

     Item 2(e)    CUSIP NUMBER:                 53226T 10 3

ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO Rule 13d-1(b) OR Rule 13d-2(b) OR
        (c), CHECK WHETHER THE PERSON FILING IS A:

               (a)  [ ]  Broker or dealer registered under section 15 of the Act
                         (15 U.S.C. 78o).

               (b)  [ ]  Bank as defined in section 3(a)(6) of the Act
                         (15 U.S.C. 78c).

               (c)  [ ]  Insurance Company as defined in section 3(a)(19) of
                         the Act (15 U.S.C. 78c).


CUSIP NO. 53226T 10 3                                          Page 5 of 7 Pages

               (d)  [ ]  Investment Company registered under section 8 of the
                         Investment Company Act of 1940 (15 (U.S.C. 80a-8).

               (e)  [ ]  An investment adviser in accordance with
                         Rule 13d-1(b)(1)(ii)(E);

               (f)  [ ]  An employee benefit plan or endowment fund
                         in accordance with Rule 13d-1(b)(1)(ii)(F);

               (g)  [ ]  A parent holding company or control person
                         in accordance with Rule 13d-1(b)(1)(ii)(G);

               (h)  [ ]  A savings association as defined in Section 3(b) of
                         the Federal Deposit Insurance Act (12 U.S.C. 1813);

               (i)  [ ]  A church plan that is excluded from the definition of
                         an investment company under Section 3(c)(14) of
                         the Investment Company Act of 1940 (15 U.S.C. 80a-3);

               (j)  [ ]  Group, in accordance with Rule 13d-1(b) (1)(ii)(J);

ITEM 4. OWNERSHIP

     Provide the following information regarding the aggregate number and
percentage of the class of securities of the issuer identified in Item 1.

          (a)  Amount Beneficially Owned:

               4,071,075 shares. The shares reported include 11,773 shares
               issuable upon the exercise of warrants. 3,538,896 shares,
               including 10,239 shares issuable upon exercise of warrants, are
               held of record by Liberty Lightspan Holdings, Inc. and 532,179
               shares, including 1,534 shares issuable upon exercise of
               warrants, are held of record by Liberty Academic Systems
               Holdings, Inc. Liberty Lightspan Holdings, Inc. and Liberty
               Academic


CUSIP NO. 53226T 10 3                                          Page 6 of 7 Pages

               Systems Holdings, Inc. are wholly owned subsidiaries of Liberty
               Digital, Inc. As of December 31, 2001 Liberty Media Corporation
               and its affiliates beneficially owned capital stock of Liberty
               Digital Inc. representing approximately 98.8% of the outstanding
               voting power of all the capital stock of Liberty Digital, Inc.
               outstanding on that date. Upon conversion of outstanding
               preferred stock of Liberty Digital, Inc. held by Liberty Media
               Corporation such percentage would increase to 99.0% as of that
               date.

          (b)  Percent of Class:

               8.75% (Based on 46,533,844 shares outstanding as reported on the
               Issuer's Quarterly Report on Form 10-Q for the period ended
               October 31, 2001.)

     INSTRUCTION. For computations regarding securities which represent a right
to acquire an underlying security SEE Rule 13d-3(d)(1).

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. [ ]

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

     Not applicable.

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

     Not Applicable.

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

     Not Applicable.


CUSIP NO. 53226T 10 3                                          Page 7 of 7 Pages

ITEM 9. NOTICE OF DISSOLUTION OF GROUP

     Not Applicable.

ITEM 10. CERTIFICATION

     Not Applicable.

                                    SIGNATURE

     After reasonable inquiry and to the best of the undersigned's knowledge and
belief, the undersigned certifies that the information set forth in this
statement is true, complete and correct.


                                        Dated: February 14, 2002

                                        LIBERTY MEDIA CORPORATION

                                        By  /s/ Elizabeth M. Markowski
                                            -----------------------------------
                                            Name:  Elizabeth M. Markowski
                                            Title: Senior Vice President


                                        LIBERTY DIGITAL, INC.

                                        By  /s/ Elizabeth M. Markowski
                                            -----------------------------------
                                            Name:  Elizabeth M. Markowski
                                            Title: Senior Vice President


ATTENTION: INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT CONSTITUTE FEDERAL
CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001).