The article discusses how to compare multiple groups using a statistical test called analysis of variance (ANOVA). It explains the process of conducting ANOVA in SPSS software and compares fixed effects ANOVA with random effects ANOVA. In fixed effects ANOVA, researchers can only analyze differences in one variable at a time, while in two-way fixed effects ANOVA, they can consider interactions between two variables. The study used ANOVA to analyze achievement data and found mean differences between teaching methods and texts, as well as potential interactions between these factors.