An Assessment of Google Classroom Reception and Usage among Pre-service Science, Technology and Mathematics Teachers in South-West Nigeria. Objectives: The present study assessed google classroom reception and usage among preservice Science, Technology, and Mathematics (STM) teachers in south-west Nigeria. Methods: The participants were 480 preservice STM teachers purposively selected from four universities in south-west Nigeria within the blueprint of a correlational survey research design. Data analysis was carried out using mean, standard deviation, Pearson product moment correlation coefficient and multiple regression analysis at 5% level of significance. Findings: Results showed that 94.1% of the variance in preservice STM teachers' actual use of google classroom was accounted for by a combination of attitude towards use, perceived ease of use, perceived usefulness, and behavioural intention to use google classroom. Conclusion: Conclusively, STM teachers' educator should promote the adoption and utilization of google classroom among the preservice STM teachers to increase their reception of google classroom for instructional purposes.