The goal of the current work was to understand how the COVID-19 pandemic school shutdowns may have impacted classroom incivility in children and adolescents. Study 1 compared prepandemic (Fall 2019) to postpandemic school shutdown (Fall 2022) rates of classroom incivility in a sample of 308 adolescents (49.7% boys; 61.0% White) between the ages of 9 and 14 (M = 12.06; SD = 1.38). Classroom incivility was significantly higher postpandemic shutdowns, while bullying, emotional problems, and friendships remained stable. In Study 2, we surveyed 101 primary educators (95% females; 88.1% White). Findings suggested that young students lacked social skills and knowledge of classroom expectations, contributing to increased classroom incivility. Our results highlight the need to monitor ongoing levels of classroom incivility. (PsycInfo Database Record (c) 2024 APA, all rights reserved).