This study is based on a questionnaire survey of teachers trained over a three-year period in a program centered at the University of Wyoming, the Portal School Project (PSP), and a similar survey of a random sample of teachers in Rocky Mountain States neighboring the region served by the PSP. Teachers were asked certain demographic questions and if they had used certain National Science Foundation (NSF) curricula for each semester between 1970 and 1974. They were also asked to rate their level of usage of the curricula. Possible urban-rural differences, cross-year differences, and junior-senior high differences for secondary curricula were investigated. Use of NSF curricula was about 40% for elementary and 68% for secondary curricula. The PSP group tended to use the NSF curricula longer than the control sample. (Author/BB)