Abstract-This study was conducted to determine the comparative effects of the synchronous and the asynchronous instructional approaches on College of Education students' achievements and interests in electrical engineering. The population of the study comprises of 190 electrical engineering students. A quasi-experimental research design was adopted. Two research questions and two hypotheses tested at a 0.05 level of significance guided the study. The research questions were answered using Mean and Standard Deviations while the Analysis of Covariance (ANCOVA) was employed to test the hypotheses. The study revealed that the asynchronous instructional approach was more effective in improving the students' achievements and stimulated their interest in learning more than the synchronous instructional approach. The study also found out that there was a significant difference in the cognitive achievement of students taught Electrical Engineering with the asynchronous instructional approach than those taught with the synchronous instructional approach. However, there was no significant difference between the mean interest scores of students taught Electrical Engineering with the asynchronous instructional approach and those taught with the synchronous instructional approach. On the basis of these findings, the study recommends, among others things, that the National Commission for Colleges of Education should develop the appropriate framework necessary for encouraging the adoption of the innovative e-learning platform such as that of the synchronous and the asynchronous instruction while the management of the Colleges of Education under study should institutionalize and encourage lecturers to use asynchronous instruction in teaching. Finally, the Lecturers should adopt the asynchronous instructional approach in teaching and learning Electrical Engineering in the Colleges of Education under study.
This research work assessed wood and plastic in building construction. The study was a descriptive survey design and as such made use of questionnaire with 42 items. The Population of the study was 110 respondent which include 40 building professional and 70 non-building professional. The data were analyzed using mean and standard deviation. T-test was used to test the null hypothesis at 0.05 level of significant. The finding of the study shows that plastic work form can be used for casting slab, concrete wall among others. The finding also revealed some factors that determines the selection of form work such as climatic condition, labour efficiency and that plastic formwork saves cost as a result of long reuse period. It is therefore recommended that; plastic and wooden formwork should be integrated often in the casting of slabs, beam and columns without discrimination, proper adherence to standards and specifications for use of any type of formwork, there should be large scale production of plastic formwork to conserve forest and wood, factors to be considered in the selection of formwork should not be ignored, there should be proper weighing of the advantages and disadvantages of each type of formwork relating to the scale of construction before the choice of any formwork.
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