In the control group, a teacher directed strategy representing the traditional approach was used. The teacher used direct teaching and question and answer methods to teach related topics and basic concepts. Basic explanations and question and answer methods suited the traditional teaching approach where students are completely passive, were used while teaching the hidden strangles unit. Teaching strategies consisted of the teacher’s explanations and textbooks. In this group, the teacher provided instruction through lecture and discussion methods to teach the concepts. The teacher structured the entire class as a unit, wrote notes on the chalkboard about the definition of concepts, and passed out worksheets for students to complete. The primary underlying principle was that knowledge takes the form of information that is transmitted to students. 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.