To use the Internet effectively, students need to be taught critical evaluation skills that they can apply to each Web site they use for research. The action research report discussed in this article exemplifies the collaborative teamwork involved in creating a critical-evaluation unit for Internet sites to be used with middle school students.

"Principles and Standards for School Mathematics" states that in the middle grades "measurement concepts and skills can be developed and used throughout the school year rather than treated exclusively as a separate unit of study" (National Council of Teachers of Mathematics 200, p. 241). This article describes a collaborative activity that…