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Hidalgo, Antonio J.; Otero, Jose – International Journal of Science Education, 2004
This paper addresses the concept of geological time as used by students who face tasks that demand three types of skills: to locate events in time, to order them according to time calendar, and to manage time intervals. The empirical study consisted of asking high school students as well as technical school students to carry out tasks that…
Descriptors: Intervals, Geology, Secondary Education, Postsecondary Education
Johnston, Lloyd D.; O'Malley, Patrick M.; Bachman, Jerald G.; Schulenberg, John E. – National Institutes of Health, 2006
In 2005, the Monitoring the Future study marked its 31st year of conducting national surveys of substance use among American young people. Beginning with the first survey of high school seniors in 1975, the study has provided the nation with a window through which to view the important, but largely hidden, problem behaviors of illicit drug use,…
Descriptors: National Surveys, High School Graduates, Futures (of Society), High Schools