Shelby, R., Schulze, K., Treacy, D., Wintersgill, M., VanLehn, K., & Weinstein, A. (2001). An assessment of the Andes tutor. Proceedings of the Physics Education Research Conference.

Andes is an intelligent problem-solving tutor for classical physics.  Its was used in the fall semester of 1999 and 2000 by a group of approximately 150 students.  An assessment of its effectiveness was made using: 1) comparative results on a free-response test taken by the Andes group and a control group, 2) portfolios of the students' work, and 3) student opinion surveys.  The results of the assessment highlight some strengths and weaknesses of Andes.

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