on Science Learning and Teaching, Volume 12, Issue 2, Article 7 (Dec., 2011)
Three instruments were used for the study
- The cooperative learning guide. This contains the roles of the teachers and the students in a cooperative learning situation. Two experts in the field of Educational psychology with knowledge in cooperative learning did the content and face validity while the language editing of the instrument was done by an expert in English Education. The purpose of this instrument is to make the subjects aware of their roles during a cooperative learning situation.
- Achievement test on chemical kinetics (ATCK). This was made up of 2 sections. Section A, was made up of 30 items multiple choice questions. Section B was made up of 10 short unanswered questions. All the questions were to be answered by the subjects in 1 hour 15 minutes. Face and content validity of the instrument was done by four science education lecturers in the University and two senior secondary school chemistry teachers. The reliability coefficient of the test was calculated to be 0.84, using Kuder-Richardson formula 20 (KR20).This instrument was used to measure the subjects’ achievement in chemical kinetics.
- Students’ attitude to chemical kinetics questionnaire (SACKQ). This was a twenty item questionnaire used to measure the subjects’ attitude to chemical kinetics. The items were rated on a four-point likert type interval scales ranging from strongly agree (SA) to strongly disagree (SD). Face and content validity of the instrument was done by four experts in test construction. The instrument was administered on a sample of senior secondary ii chemistry students (SSII) in Ijebu-Ode Ogun State. The data gathered were used to compute the cronbanch coefficient alpha of the instrument which yielded a value of 0.79.
- Lesson notes on chemical kinetics: - There were six lesson notes, which were prepared on weekly basis for the six weeks of treatment for the study. The duration for each lesson was 80 minutes (double periods).The essence of this instrument is to guide the research assistants (teachers) on the steps and procedure to follow during treatment.
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