Project-Based Learning in General:

Less Teaching and More Learning
Turning from traditional methods to project-based instruction, the author found that her adult students learned more. (Focus on Basics, December, 1998)

Knowledge in Action: The Promise of Project-Based Learning
In this article for adult education teachers, the author looks at project work links project-based learning to other approaches to teaching and learning, and the benefits to be derived for adult learners, particularly in areas related to second language acquisition and preparation for the world of work. (Focus on Basics, December, 1998)

Principles and Opportunities
Web version of a TESOL 2000 presentation that makes the case for project-based learning.

Assessment:

http://www.geocities.com/sgaer/pbl/assessment.htm
Not just one article, this Web site actually has pulled together several pieces and suggestions on assessing project-based learning activities.

Project-Based Learning and Technology:

Technology as Cognitive Tools: Learners as Designers
Academic paper on the use of computers and technology as "cognitive tools" makes a good argument that the use of computers is most meaningful when used as tools.