After the teacher’s explanations, some concepts were discussed, prompted by teacher-directed questions. Worksheets were developed specifically for each lesson. These required written responses and reinforced the concepts presented in the classroom sessions. They were collected and corrected by the researcher. Each lesson typically consisted of the teacher presenting the correct way to solve problems. The majority of instructional time was devoted to instruction and engaging in discussion stemming from the teacher’s explanation and questions. Both traditional and inquiry classes used the same textbook and handouts. The study took 8 weeks, six weeks for the instruction, two weeks for the application of the pre- and the post-tests.