<PAGE>

                                                                    EXHIBIT 24.1

                          DIRECTOR'S POWER OF ATTORNEY
                                (2007 Form 10-K)

         The undersigned director of Renaissance Learning, Inc. designates each
of Terrance D. Paul and Mary T. Minch, with the power of substitution, as her
true and lawful attorney-in-fact for the purpose of: (i) executing in her name
and on her behalf Renaissance Learning, Inc.'s Form 10-K for the fiscal year
ended December 31, 2007 and any related amendments and/or supplements; (ii)
generally doing all things in her name and on her behalf in her capacity as a
director to enable Renaissance Learning, Inc. to comply with the provisions of
the Securities Act of 1934, as amended, and all requirements of the Securities
and Exchange Commission; and (iii) ratifying and confirming her signature as it
may be signed by the attorney-in-fact to the Form 10-K and any related
amendments and/or supplements.

         Dated this 30th day of January, 2008.

                                                      /s/  Judith A. Paul
                                                     --------------------------
                                                     Judith A. Paul


                                       1
<PAGE>

                          DIRECTOR'S POWER OF ATTORNEY
                                (2007 Form 10-K)

         The undersigned director of Renaissance Learning, Inc. designates Mary
T. Minch, with the power of substitution, as his true and lawful
attorney-in-fact for the purpose of: (i) executing in his name and on his behalf
Renaissance Learning, Inc.'s Form 10-K for the fiscal year ended December 31,
2007 and any related amendments and/or supplements; (ii) generally doing all
things in his name and on his behalf in his capacity as a director to enable
Renaissance Learning, Inc. to comply with the provisions of the Securities Act
of 1934, as amended, and all requirements of the Securities and Exchange
Commission; and (iii) ratifying and confirming his signature as it may be signed
by the attorney-in-fact to the Form 10-K and any related amendments and/or
supplements.

         Dated this 30th day of January, 2008.

                                                      /s/  Terrance D. Paul
                                                     --------------------------
                                                     Terrance D. Paul


                                       2
<PAGE>

                          DIRECTOR'S POWER OF ATTORNEY
                                (2007 Form 10-K)

         The undersigned director of Renaissance Learning, Inc. designates
Terrance D. Paul and Mary T. Minch, with the power of substitution, as his true
and lawful attorney-in-fact for the purpose of: (i) executing in his name and on
his behalf Renaissance Learning, Inc.'s Form 10-K for the fiscal year ended
December 31, 2007 and any related amendments and/or supplements; (ii) generally
doing all things in his name and on his behalf in his capacity as a director to
enable Renaissance Learning, Inc. to comply with the provisions of the
Securities Act of 1934, as amended, and all requirements of the Securities and
Exchange Commission; and (iii) ratifying and confirming his signature as it may
be signed by the attorney-in-fact to the Form 10-K and any related amendments
and/or supplements.

         Dated this 28th day of January, 2008.

                                                      /s/  John H. Grunewald
                                                     --------------------------
                                                     John H. Grunewald


                                       3
<PAGE>

                          DIRECTOR'S POWER OF ATTORNEY
                                (2007 Form 10-K)

         The undersigned director of Renaissance Learning, Inc. designates
Terrance D. Paul and Mary T. Minch, with the power of substitution, as his true
and lawful attorney-in-fact for the purpose of: (i) executing in his name and on
his behalf Renaissance Learning, Inc.'s Form 10-K for the fiscal year ended
December 31, 2007 and any related amendments and/or supplements; (ii) generally
doing all things in his name and on his behalf in his capacity as a director to
enable Renaissance Learning, Inc. to comply with the provisions of the
Securities Act of 1934, as amended, and all requirements of the Securities and
Exchange Commission; and (iii) ratifying and confirming his signature as it may
be signed by the attorney-in-fact to the Form 10-K and any related amendments
and/or supplements.

         Dated this 2nd day of February, 2008.

                                                    /s/  Gordon H. Gunnlaugsson
                                                   ----------------------------
                                                   Gordon H. Gunnlaugsson


                                       4
<PAGE>

                          DIRECTOR'S POWER OF ATTORNEY
                                (2007 Form 10-K)

         The undersigned director of Renaissance Learning, Inc. designates
Terrance D. Paul and Mary T. Minch, with the power of substitution, as his true
and lawful attorney-in-fact for the purpose of: (i) executing in his name and on
his behalf Renaissance Learning, Inc.'s Form 10-K for the fiscal year ended
December 31, 2007 and any related amendments and/or supplements; (ii) generally
doing all things in his name and on his behalf in his capacity as a director to
enable Renaissance Learning, Inc. to comply with the provisions of the
Securities Act of 1934, as amended, and all requirements of the Securities and
Exchange Commission; and (iii) ratifying and confirming his signature as it may
be signed by the attorney-in-fact to the Form 10-K and any related amendments
and/or supplements.

         Dated this 15th day of February, 2008.

                                                      /s/  Harold E. Jordan
                                                     --------------------------
                                                     Harold E. Jordan


                                       5
<PAGE>

                          DIRECTOR'S POWER OF ATTORNEY
                                (2007 Form 10-K)

         The undersigned director of Renaissance Learning, Inc. designates
Terrance D. Paul and Mary T. Minch, with the power of substitution, as his true
and lawful attorney-in-fact for the purpose of: (i) executing in his name and on
his behalf Renaissance Learning, Inc.'s Form 10-K for the fiscal year ended
December 31, 2007 and any related amendments and/or supplements; (ii) generally
doing all things in his name and on his behalf in his capacity as a director to
enable Renaissance Learning, Inc. to comply with the provisions of the
Securities Act of 1934, as amended, and all requirements of the Securities and
Exchange Commission; and (iii) ratifying and confirming his signature as it may
be signed by the attorney-in-fact to the Form 10-K and any related amendments
and/or supplements.

         Dated this 1st day of February, 2008.

                                                      /s/  Addison L. Piper
                                                     --------------------------
                                                     Addison L. (Tad) Piper


                                       6
<PAGE>

                          DIRECTOR'S POWER OF ATTORNEY
                                (2007 Form 10-K)

         The undersigned director of Renaissance Learning, Inc. designates
Terrance D. Paul and Mary T. Minch, with the power of substitution, as her true
and lawful attorney-in-fact for the purpose of: (i) executing in her name and on
her behalf Renaissance Learning, Inc.'s Form 10-K for the fiscal year ended
December 31, 2007 and any related amendments and/or supplements; (ii) generally
doing all things in her name and on her behalf in her capacity as a director to
enable Renaissance Learning, Inc. to comply with the provisions of the
Securities Act of 1934, as amended, and all requirements of the Securities and
Exchange Commission; and (iii) ratifying and confirming her signature as it may
be signed by the attorney-in-fact to the Form 10-K and any related amendments
and/or supplements.

         Dated this 29th day of January, 2008.

                                                      /s/  Judith A. Ryan
                                                     --------------------------
                                                     Judith A. Ryan


                                       7