The electronic and molecular structure of the acylium cation ([CH[subscript 3]CO][superscript +], 1) receives varied treatment in undergraduate textbooks and online resources. The overall structure of 1 is typically represented as an equal combination of resonance structures containing C-O triple and double bonds, the latter structure occasionally…

The apartheid policies in South Africa had a marked influence on the accessibility and quality of school science experienced by the different race groups. African learners in particular were seriously disadvantaged in this regard. The issues of equity and redress were foremost in transformation of the education system, and the accompanying…

In the elementary and secondary schools, there is a movement toward a sequential instructional program which would involve the offering of a laboratory science each year from kindergarten to high school graduation. In some schools teachers have turned to science kits as a partial solution to the problems presented by restricted space, inadequate…