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The Study examined the use of virtual oscilloscope as alternative instructional materials for teaching electronics at the technical colleges in North East geopolitical zone of Nigeria. Two research questions were formulated to guide the study. The population for the study consisted of 160 students from four science and technical colleges that offer RTE, from which 124 students were sampled and randomly assigned to either experimental group or control group. A structured questionnaire titled; researcher made achievement test (RMAT) which is same for pretest and the researcher made retention test (RMRT) but numbering varies, were used. It consists of 45 items and a researcher made performance test (RMPT) was used for data collection. The drafts of the RMAT and a table of specification were given to six experts from two universities for validation. The test-retest method was employed for testing the reliability of the instrument. The reliability coefficient obtained was r = 0.78 and was found suitable. The simple mean and standard deviation were used to analyze the data for answering the research questions. The findings include, the virtual oscilloscope was tested with no problem and could display various waveforms; measure voltages, time and frequency and detect signals. It was recommended among others that; due to its numerous advantages, which include large screen using data projector for demonstration, easier to operate, portability, among others. All hands must be on deck, to see that the virtual oscilloscope is purchased by all concerned and used to complement the real oscilloscope for teaching not only RTE but all related areas.

Virtual Oscilloscope: Alternative Instructional Materials For Teaching Electronics At The Technical Colleges, In North East Geopolitical Zone, Nigeria