The study was carried out to investigate the effect of improvisation in teaching and learning of electrical installation and maintenance work in Adamawa State, Nigeria. The study adopted quasi-experimental design with Pre-test, Post-test non-equivalent control group. The population of the study was the three technical colleges in Adamawa State with one hundred and eleven students. Two schools were purposively sampled with a sample size of seventy three, thirty seven (37) students were from government technical college Mubi made up of twenty nine males (29), eight females (8) that was used for the experimental group and thirty six (36) students are from government science and technical college Yola; thirty two males (32) and four females (4) were used for the control group. The research instruments was developed by the researcher and was placed under face and content validity which was used for data collection. The instrument was tagged Electrical Installation and Maintenance Work Performance Test Questionnaire (EIMWPTQ). The EIMWPTQ was a 27 item objective questions with four options that was administered on all the groups before the commencement of teaching (Pre-test). This was later administered as Post-test on the students after the treatment. Mean and standard deviation was used to answer the research questions while t-test using analysis of covariance (ANCOVA) was used to test the null hypotheses. Result from the findings shows a positive significant difference in the performance of students taught Electrical Installation and Maintenance Works Trade with the use of improvised instructional materials when compared with those taught using lecture method. Also, finding shows a positive significant difference in the performance of male and female taught EIMW using improvised instructional materials. It was concluded that since the students taught EIMW with the use of improvised instructional materials had a better mean score than those taught using lecture method. Recommendation, Teachers should be encourage to use instructional materials when teaching, enough funds should be given to teachers to buy materials for improvisation when the real objects are not available, there is need for re-training of teachers through workshops, seminars and conferences on the importance of using instructional materials while teaching which will enhance skill acquisition by students necessary for national development.