| The purpose of this study was to determine if there were any significant differences (p < .05) in cognitive achievement between different instructional techniques on students enrolled in high school agricultural science classes in Northwest Arkansas. Lesson content covered the production, uses, and performance of biodiesel fuels in compression engines. Treatments were different instructional techniques including lecture, demonstration, and a combination of lecture and demonstration. Cognitive achievement was measured on low level cognition and high level cognition. In addition, this study sought to find any correlation between student perceptions of lecture versus demonstration and tinkering self-efficacy on student achievement.;A true experimental pretest-posttest design (;Data collected for this study revealed no significant difference across instructional techniques on knowledge acquisition (F(2)=0.68, p=.52). However, when comparing treatments and cognitive achievement, there was a significant difference between the combination technique (2.92, SD .55) and the lecture technique (2.00, SD .65) on high cognitive achievement. There was not a significant difference on students' cognitive achievement on low level cognition. There was not a significant correlation between student perceptions (preference) of instructional technique and knowledge acquisition. Nor was there a significant correlation between student perceptions of tinkering self-efficacy and knowledge acquisition. There was a significant correlation between tinkering self-efficacy and student preference of instructional technique. |
