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Howitz, William J.; McKnelly, Kate J.; Link, Renée D. – Journal of Chemical Education, 2021
Large, multisection laboratory courses are particularly challenging when managing grading with as many as 35 teaching assistants (TAs). Traditional grading systems using point-based rubrics lead to significant variations in how individual TAs grade, which necessitates the use of curving across laboratory sections. Final grade uncertainty…
Descriptors: Grading, Curriculum Development, Curriculum Implementation, Organic Chemistry
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Esselman, Brian J.; Hill, Nicholas J. – Journal of Chemical Education, 2015
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…
Descriptors: Investigations, Undergraduate Students, Molecular Structure, Knowledge Representation