1. American Institutes for Research. (2007, November). 8th graders in most U.S. states performing better in math and science than students in most foreign countries: Students in highest achieving U.S. states rank significantly below students in highest achieving countries. Washington, DC: Author. Retrieved July 31, 2008, from http://www.air.org/news/pr/8thGrader.aspx
2. Curriculum-Based Ecosystems: Supporting Knowing From an Ecological Perspective