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Schmidt, Hans-Jurgen – 1992
The purpose of this descriptive study was to create and test questions on stoichiometry with number ratios for quick mental calculations and to identify students' problem-solving strategies. The present study was a component of a more comprehensive investigation in which 7,441 German senior high school students were asked to work on 154 test items…
Descriptors: Chemistry, Cognitive Style, Computation, Concept Formation