The study investigated the impact of computer tutorials and simulation techniques on the achievement of electrical installation students in technical colleges in Osun State. A quasi-experimental pre-test and post-test three-group design was adopted for the study, comprising two experimental groups and one control group. The population targeted in the study consisted of 210 electrical installation students from nine technical colleges in Osun State. A sample of 81 students was selected through a multistage sampling procedure, involving purposive sampling of technical colleges from different senatorial districts and intact classes within these colleges. Three research instruments were used: the Electrical Installation Performance Test (EIPT), the Computer Tutorial Package (CTP), and the Instructional Simulation Package (ISP). Reliability was established through a test-retest method with a reliability coefficient value of 0.837. The experimental procedure consisted of pre-treatment, treatment, and post-treatment stages. Data were analyzed using descriptive and inferential statistics, with hypotheses tested through One-way ANOVA, ANCOVA, and t-tests at a 0.05 significance level. The analysis revealed that prior to treatment, there was no significant difference in the performance mean scores of students using computer tutorials, simulation techniques, and conventional methods in electrical installation. However, after treatment, significant differences emerged among these methods. Additionally, significant differences were observed in student performance before and after treatment across the different methods. The use of computer tutorials, and simulation technique enhanced better performance of students in electrical installation than the conventional method with simulation technique being the most effective strategy. It was recommended among others that the use of computer tutorials and simulation technique should be encouraged in electrical installation class in technical colleges so as to enhance better academic performance of students in electrical installation.