One of the requirements of the Open Course Library project was that students could not spend more than $30 on materials. While we chose to use Dettwyler's ethnography Dancing Skeletons, there are a few readers and lab manuals that are available online that meet this requirement (available on CourseSmart).
Angeloni, Elvio, ed. 2011. Annual Editions: Physical Anthropology 11/12, 20thedition. Boston: McGraw Hill.
Hens, Samantha M. 2008. Method and Practice in Biological Anthropology: A Workbook and Laboratory Manual for Introductory Courses. Upper Saddle River, NJ: Pearson.
Sandford, M. K., ed. 2009. Classic and Contemporary Readings in Physical Anthropology. Belmont, CA: Cengage Learning/Wadsworth.