Most timeline analogies of geologic and evolutionary time are fundamentally flawed. They trade off the problem of grasping very long times for the problem of grasping very short distances. The result is an understanding of relative time with little comprehension of absolute time. Earlier work has shown that the distances most easily understood by…

The purpose of this study is to investigate differences between traditional conventional professional development and high quality reflective professional development and curriculum implementation of classroom practices. This study examined the extent to which professional development activities were associated with increased levels of curriculum…

Classroom response systems, or clickers, have become pedagogical staples of the undergraduate science curriculum at many universities. In this study, the effectiveness of clickers in promoting problem-solving skills in a genetics class was investigated. Students were presented with problems requiring application of concepts covered in lecture and…

Few school principals or teachers of extended experience fail to realize the need among their pupils for some sort of instruction and guidance in matters pertaining to sex. Undoubtedly this realization has led to the many spontaneous attempts to introduce sex instruction into high schools. Experiments have sprung up all over the country, a few…

A study conducted in 1989 surveyed Technology Student Association (TSA) advisors to find their perceptions concerning characteristics of technology education programs with a TSA component and the relationship between participation in co-curricular organizations and the teaching methods used by TSA technology teachers (DeLuca & Haynie, 1991).…