Evaluation of the Effect of PowerPoint Presentation on the Learning Outcomes of Polytechnic Students in Technical Drawing.

Abstract

The study examined the learning outcome of PowerPoint presentation on students’ academic performance and retention compared to conventional method of chalk and board in technical drawing in three Polytechnics. Quasi-experimental design of pretest-posttest non-equivalent nonrandomized control group design was adopted. The population consists of 308 ND II technical drawing students of three Polytechnics in Kaduna State with a sample size of 205 students drawn by purposive sampling technique. Technical Drawing Achievement Test was used to elicit data on learning outcome.  ANCOVA results of mean performance scores of the students taught technical drawing using PowerPoint presentation and those taught using Chalk and Talk indicated that the difference in the mean scores of the two groups is not statistically significant while the result of retentions scores of the students taught technical drawing using PowerPoint presentation and those taught using chalk and Talk found significant difference in the mean retention score in favour of the experimental group.  Again, there is no significance difference in the mean academic performance scores of male and female students taught technical drawing using PowerPoint Presentation. with calculated p-values of 0.479 > 0.05 alpha level. The study also revealed that there is no significant difference in the retention scores of male and female students taught technical drawing using PowerPoint Presentation. The results imply that the effect of PowerPoint presentation on retention is not gender bias. It is therefore apparent that there are educational advantages on retention in integrating PowerPoint in the teaching of technical drawing.