Due to widespread COVID-19 infection across the globe, many communities have reduced recreational offerings, schools have altered education formats, and some workplaces have allowed employees to work remotely. Early studies from the spring and summer months of 2020 indicate that children’s physical activity (PA) decreased during the pandemic, but this may have changed with resumption of school in the fall of 2020 and may vary according to school format. PURPOSE: This cross-sectional survey, distributed in November 2020, was designed to identify factors associated with achievement of guidelines for healthy lifestyle behaviors (60 min/day of PA, < 2 h/day of screen time (ST), and > 9 h/night of sleep) among school-aged children. METHODS: Parents of children age 6-17 y were recruited via email and social media posts. Most participants (57%) lived in the midwestern region of the United States. The survey included questions about school format, home characteristics (e.g., backyard size, number of connected devices in the home), child PA, child ST, child bedtime and waketime, and parental support of child PA. Achievement of PA, ST, and sleep recommendations was compared by school format, access to recreational spaces, and access to play equipment, with and without adjustment for child age. RESULTS: Children were classified as meeting or not meeting recommendations for PA, ST, sleep, and for the all three guidelines. Overall, only 9.1% engaged in PA for at least 60 minutes 7 days per week and only 13.7% engaged in less than 2 h of screen time on the average weekday. However, 81% slept at least 9 h/night. None of the children included in this sample met all three guidelines (PA, ST, and sleep). None of the household factors included in this analysis predicted achievement of lifestyle recommendations. CONCLUSIONS: Our findings indicate that school aged children were overwhelmingly failing to meet movement guidelines during November 2020, regardless of school format. These findings are concerning given the expectation that PA may decrease and ST may increase with the onset of winter in the Northern Hemisphere.