This paper analyses the current research regarding student evaluations of courses and teaching. The article argues that student evaluations are influenced by racist, sexist and homophobic prejudices, and are biased against discipline and subject area. This paper's findings are relevant to policymakers and academics as student evaluations are undertaken in over 16,000 higher education institutions at the end of each teaching period. The article's purpose is to demonstrate to the higher education sector that the data informing student surveys is flawed and prejudiced against those being assessed. Evaluations have been shown to be heavily influenced by student demographics, the teaching academic's culture and identity, and other aspects not associated with course quality or teaching effectiveness. Evaluations also include increasingly abusive comments which are mostly directed towards women and those from marginalised groups, and subsequently make student surveys a growing cause of stress and anxiety for these academics. Yet, student evaluations are used as a measure of performance and play a role in hiring, firing and promotional decisions. Student evaluations are openly prejudiced against the sector's most underrepresented academics and they contribute to further marginalising the same groups universities declare to protect, value and are aiming to increase in their workforces.