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Jackson, Benjamin A.; Harshman, Jordan; Miliordos, Evangelos – Journal of Chemical Education, 2020
The concept of an atom with an expanded octet, known as hypervalency, has persisted in the general chemistry curriculum, despite abundant theoretical work disputing its veracity. Here, the electronic structure of traditionally hypervalent molecules (H[subscript 2]SO[subscript 3], H[subscript 2]SO[subscript 4], PF[subscript 5], and SF[subscript 6])…
Descriptors: Chemistry, Molecular Structure, Science Instruction, Scientific Concepts
Altass, Patricia; Wiebe, Sean – Online Submission, 2017
New digital technologies are changing the nature and contexts of work in Canada. It is essential that education policy and practice acknowledge and respond to these changes. The impacts and implications of new and emerging technologies for work can be summarized within two paradigms: technology is replacing work through automation and digital…
Descriptors: Foreign Countries, Personnel Management, Automation, Fundamental Concepts
Hester, Yvette – 1996
Analysis of variance (ANOVA) was invented in the 1920s to partition variance of a single dependent variable into uncorrelated parts. Having uncorrelated parts makes the computations involved in ANOVA incredibly easier. This was important before computers were invented, when calculations were all done by hand, and also were done repeatedly to check…
Descriptors: Analysis of Variance, Computation, Correlation, Heuristics
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Watson, Jane M. – Educational Studies in Mathematics, 2007
Two strands of research motivate this study. One is the interest in school students' development of understanding of the concept of average, historically part of the mathematics curriculum and prominent in the statistics curriculum introduced in the early 1990s. The other is the belief of some educators that students learn meaningfully when…
Descriptors: Grade 3, Conflict, Mathematics Instruction, Grade 6
Ramos, Cristina – 1996
Grade-equivalent scores are widely used in the school system in reporting students' performance on standardized achievement tests. This paper explores how grade equivalent scores are calculated and interpreted. In addition, the paper examines the limitations of grade-equivalent scores through the use of small heuristic data sets. A…
Descriptors: Achievement Tests, Age Differences, Comparative Analysis, Computation