Exhibit 3.24

                            CERTIFICATE OF AMENDMENT

                                       OF

                          CERTIFICATE OF INCORPORATION

      K-111 REFERENCE CORPORATION, a corporation organized and existing under
and by virtue of the General Corporation Law of the State of Delaware (the
"Corporation"),

      DOES HEREBY CERTIFY:

      FIRST: That the Board of Directors of the Corporation duly adopted
resolutions setting forth and declaring advisable a proposed amendment to the
Certificate of Incorporation of said Corporation:

            RESOLVED, that the Certificate of Incorporation of this Corporation
            be amended by changing the First Article so that, as amended, said
            Article shall be and read as follows: "The name of the Corporation
            is PRIMEDIA Reference Inc.".

      SECOND: That by written consent, filed with the minutes of the
Corporation, the sole stockholder approved said amendment in accordance with the
provisions of Section 228 of the General Corporation Law of the State of
Delaware.

      THIRD: That the aforesaid amendment to the Corporation's Certificate of
Incorporation was duly adopted in accordance with the applicable provisions of
Section 242 and Section 228 of the General Corporation Law of the State of
Delaware.

      IN WITNESS WHEREOF, said K-111 Reference Corporation has caused this
Certificate to be executed by Beverly Chell its authorized officer, on this 14th
day of November, 1997.


                                              By
                                             Name: Beverly Chell
                                            Title: Vice Chairman & Secretary