<PAGE>

                                                                    EXHIBIT 24.1

                          DIRECTOR'S POWER OF ATTORNEY
                                (2006 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, 2006 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 31st day of January, 2007.


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


                                        1

<PAGE>

                          DIRECTOR'S POWER OF ATTORNEY
                                (2006 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, 2006 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 31st day of January, 2007.


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


                                        2

<PAGE>

                          DIRECTOR'S POWER OF ATTORNEY
                                (2006 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, 2006 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 17th day of January, 2007.


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


                                        3

<PAGE>

                          DIRECTOR'S POWER OF ATTORNEY
                                (2006 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, 2006 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 17th day of January, 2007.


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


                                        4

<PAGE>

                          DIRECTOR'S POWER OF ATTORNEY
                                (2006 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, 2006 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 18th day of January, 2007.


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


                                        5

<PAGE>

                          DIRECTOR'S POWER OF ATTORNEY
                                (2006 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, 2006 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 26th day of January, 2007.


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


                                        6

<PAGE>

                          DIRECTOR'S POWER OF ATTORNEY
                                (2006 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, 2006 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 19th day of January, 2007.


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


                                        7