I have conducted a study comparing an experimental group to a control group. Both groups were given a pre-test. The experimental group was then treated with a math gaming system. After a seven week period a post test was administered to both groups. Math scores were compared using ANOVA to determine if the scores were significantly different. ANOVA assumes homogeneity of variance. My study failed. Laerd said that this violation was not a serious one when the groups are equal sized as mine were. However, they make post hoc suggestions to remedy the violation but the post hocs require at least three categories (pre,mid,post) to determine where the differences lie. I have reported that the violation is not serious. How do I report why and explain in dissertation format that I can't remedy through post hoc. Or is homogeneity even applicable with a prepost test?