The study was designed determined investigate the effectiveness of 3 Instructional methods on students’ Academic Achievement in Basic Technology in Lagos State. A guest experimental was used for the study using random sampling technique. One hundred and seventy-four (174) Basic eight (JSS II) basic technology students was used compering 86 marks and 88 females. The instrument for Data collection are pre-test (Pre BTAT) and post-test (Post BTAT). One (1) research question and one (1) hypothesis tested at 0.05 level of Signiant guided the study. The raw ability of the Basic Technology Achievement Test (BTAT) instrument using Knitter Richardson formula (KR-20) Yielded r=0.64 Data generated were analysed using mean and analysis of variance (ANOVA). The finishing shows that simulation activity and community of inquiry have significant effect in the achievement of students. The findings show that there is significant effect on the academic achievement with in basic technology with students taught using Simulation Activities (SA) and Community of Inquiry (COI) and those taught using Conventional Teaching Method (CTM). But the overall finding, revealed that SA is a viable alternative to COI and CTM of instruction basic technology.