T. M. Paulus, B. Horvitz, and M. Shi, ???Isn???t It Just Like Our Situation???? Engagement and Learning in an Online Story-Based Environment, Educational Technology Research and Development, vol.22, issue.1, pp.355-385, 2006.
DOI : 10.1007/s11423-006-9604-2

R. Kindley, The power of simulation-based e-learning (SIMBEL). The E-learning Developers' Journal, pp.1-8, 2002.

R. Kindley, Scenario-Based e-Learning (SBeL): A step beyond traditional e-learning we all can take. ASTD Online Magazine Learning-Circuits, 2002.

M. J. Bender, Scenario-based e-learning Encyclopedia of Educational Technology, 2007.

L. Ziegahn, Talk' about culture online: The potential for transformation. Distance Education, pp.144-150, 2001.

P. A. Jaques, Using an animated pedagogical agent to interact affectively with the student. Thesis (Ph, Universidade Federal do Rio Grande do Sul. Programa de Pós-Graduação em Computação ? Doutorado, 2004.

Y. Kim and A. L. Baylor, Pedagogical Agents as Learning Companions: The Role of Agent Competency and Type of Interaction, Educational Technology Research and Development, vol.71, issue.3, pp.223-243, 2006.
DOI : 10.1007/s11423-006-8805-z

E. B. Reategui and M. C. Moraes, Agentes Pedagógicos Animados: Concepção, desenvolvimento e aplicação, RENOTE, issue.42, 2006.

R. Moreno, R. E. Mayer, H. A. Spires, and J. C. Lester, The Case for Social Agency in Computer-Based Teaching: Do Students Learn More Deeply When They Interact With Animated Pedagogical Agents?, Cognition and Instruction, vol.23, issue.2, pp.177-213, 2001.
DOI : 10.1037//0022-0663.82.4.616

R. K. Atkinson, Optimizing learning from examples using animated pedagogical agents., Journal of Educational Psychology, vol.94, issue.2, pp.416-427, 2002.
DOI : 10.1037/0022-0663.94.2.416

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.490.1475

H. Morton and M. A. Jack, Scenario-based spoken interaction with virtual agents. Computer-Assisted Language Learning, v, pp.171-191, 2005.
DOI : 10.1080/09588220500173344

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.464.3567

P. Skehan, Focus on Form, Tasks and Technology. Computer-Assisted Language Learning, pp.391-411, 2003.
DOI : 10.1076/call.16.5.391.29489

E. Polonia and P. , D Universidade Federal do Rio Grande do Sul Núcleo de Educação a Distância do Instituto de Letras Av, Bento Gonçalves, vol.7, issue.7, pp.9500-91540

B. Agronomia and ?. Porto-alegre, RS ? Brasil epolonia@orion.ufrgs.br Letícia Roland, Coordinator LearningBrazilian.com Rua Augusto Pestana 128 ? 01 CEP 90040-200