ERIC Number: ED351183
Record Type: Non-Journal
Publication Date: 1991-Jun
Reference Count: N/A
Proportional Reasoning in the Solution of Problems in High School Chemistry and Its Impact on Developing Critical Thinking Skills.
Guthrie, Janice M.
The concept of the mole and its relationship to chemical algebra is difficult for many high school chemistry students to master. This paper describes a study of the use of proportional reasoning when teaching mole relationships and its effect on developing critical thinking skills. The Test of Logical Thinking (TOLT) was used as a pre- and post-assessment of students' critical thinking skills. An experimental group (n=29) was taught to solve stoichiometry problems by proportional reasoning, while a control group (n=28) used dimensional analysis. From the results, it was concluded that teaching stoichiometric relationships through proportional reasoning had no apparent effect on developing critical thinking skills in the experimental group. There was, however, an apparent improvement in the students' ability to work together toward solutions, to express their thinking processes verbally, and to listen to and evaluate the comments of others. From a survey of 40 local high school chemistry teachers (return rate of 47%), it was found that two-thirds of the teachers used dimensional analysis as their method for teaching stoichiometry. Appended materials include the TOLT, a Critical Thinking and Self-Reflection Checklist, worksheets, laboratory sheets, a stoichiometry test, and a weekly progress questionnaire. (PR)
Publication Type: Dissertations/Theses - Practicum Papers
Education Level: N/A
Authoring Institution: N/A
Identifiers - Assessments and Surveys: Test of Logical Thinking