This document presents a collection of field observations, from 11 sites, submitted as a part of the final report of a project funded by the National Science Foundation to gather data about science, mathematics and social science education in American schools. Schools involved a variety of settings: rural-urban, racially diverse, socioeconomically different, and located throughout the United States. Field observers spend 4-15 weeks on site, gathering data. Biographical information on each field observer accompanies his/her case study. (PEB)