Achievement in mathematics can act as an indicator of student ability in subjects that require mathematics proficiency such as science, technology and engineering. Analysis of data from the Programme for International Student Assessment 2012 study on high school students from Australia was performed to evaluate the potential effects of various teaching strategies on mathematics outcomes. Aspects of teaching considered included student-teacher relations, classroom management, teacher support, disciplinary climate, cognitive activation, formative assessment, student orientation, and teacher directed instruction. Parent education levels and economic status were also considered as potential influences of performance and were found to have significant effects on mathematics performance with students whose parents were more highly educated recording higher results, on average. Cognitive activation, disciplinary climate, student-teacher relations, and vignette classroom management were found to have a significant positive impact on mathematics performance. Student orientation had a significant negative effect on mathematics performance and greater use of it was associated with lower mathematics achievement. The results of this study can offer valuable insights into how teaching strategies, along with other factors, can be augmented to help improve confidence in, and hence, performance in mathematics.