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Exhibit 24.1 DIRECTORS POWER OF ATTORNEY
(2004 Form 10-K) The undersigned director of Renaissance Learning, Inc. designates each of John R. Hickey 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, 2004 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 21st day of January, 2005. /s/  Judith A. PaulJudith A. Paul 6




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DIRECTORS POWER OF ATTORNEY
(2004 Form 10-K) The undersigned director of Renaissance Learning, Inc. designates each of John R. Hickey 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, 2004 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 21st day of January, 2005. /s/  Terrance D. PaulTerrance D. Paul 7




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DIRECTORS POWER OF ATTORNEY
(2004 Form 10-K) The undersigned director of Renaissance Learning, Inc. designates each of John R. Hickey 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, 2004 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 29th day of January, 2005. /s/  John H. GrunewaldJohn H. Grunewald 8




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DIRECTORS POWER OF ATTORNEY
(2004 Form 10-K) The undersigned director of Renaissance Learning, Inc. designates each of John R. Hickey 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, 2004 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, 2005. /s/  Gordon H. GunnlaugssonGordon H. Gunnlaugsson 9




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DIRECTORS POWER OF ATTORNEY
(2004 Form 10-K) The undersigned director of Renaissance Learning, Inc. designates each of John R. Hickey 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, 2004 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 20th day of January, 2005. /s/  Harold E. JordanHarold E. Jordan 10




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DIRECTORS POWER OF ATTORNEY
(2004 Form 10-K) The undersigned director of Renaissance Learning, Inc. designates each of John R. Hickey 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, 2004 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 25th day of January, 2005. /s/  Addison L. PiperAddison L. (Tad) Piper 11




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DIRECTORS POWER OF ATTORNEY
(2004 Form 10-K) The undersigned director of Renaissance Learning, Inc. designates each of John R. Hickey 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, 2004 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 25th day of January, 2005. /s/  Judith A. RyanJudith A. Ryan 12