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Submitted on: 21 August 2005.
Revised on: 14 December 2005.
Accepted on: 17 January 2006.
___________________JOURNAL OF THE LEARNING SCIENCES
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Submitted on: 15 November 2012.
Revised on: 25 February 2013.
Accepted on: 22 March 2013.
___________________JOURNAL OF THE LEARNING SCIENCES
Submitted on: 18 February 2006.
Revised on: 27 March 2006.
Accepted on: 13 May 2006.
___________________JOURNAL OF THE LEARNING SCIENCES
Submitted on: 24 January 2025.
Revised on: 11 March 2025.
Accepted on: 29 April 2025.
___________________JOURNAL OF THE LEARNING SCIENCES
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