<p>Recent years have seen debate over the intrusion of progressive sociopolitical narratives, henceforth referred to as CRT(ish) into K12 education. Though passionate, these debates have often progressed with little data regarding how common these narratives are in education or evidence whether they are harmful. The current preregistered study sought to add data to this debate with a sample of 221 youth aged 13–18. Exposure to CRT(ish) sociopolitical beliefs via teachers was, overall, common in this sample. Left-wing authoritarian beliefs were likewise common among youth, though CRT(ish) exposure did not predict the latter. CRT(ish) exposure was generally not associated with negative outcomes, but mental health problems were. Mental health problems and were associated with left-wing authoritarian beliefs, and such beliefs were also more common among girls than boys. Left-wing authoritarian beliefs were also associated with classist attitudes. Non-ideological teaching of the history or race and racism in the US was widely common, suggesting progressive worries on this score are misplaced. In exploratory analyses, trait victimhood was associated with higher ethnocentrism, classism, and left-wing authoritarianism. Cluster analysis suggested that left-wing authoritarianism is particularly common among girls with higher mental health symptoms and trait victimhood. Overall, left-wing authoritarian beliefs are worryingly common among youth, but appear less tied to CRT(ish) infused teaching than clustered particularly among girls with mental health problems, perceptions of victimhood and classist beliefs.</p>