Cambodian primary schools shifted to remote teaching for extended periods during the 2020-21 COVID-19 pandemic. The results from national learning assessments of grade 6 students show that overall averages in Khmer language and mathematics in 2021 were 0.30-0.75 standard deviations below 2016 levels. There is some evidence that learning gaps between key strata were actually smaller in 2021 than in 2016, but the more certain conclusion is that concerns that the pandemic would exacerbate learning inequality are not supported, and the larger problem is the significant increase in the number of students in the critically low achievement levels. Statistical modeling identified a limited number of emergency remote teaching activities related to basic reinforcement (i.e., asking students to submit assignments) and technology-based interaction (including use of social media) that are significantly associated with higher test scores in 2021. But student access to these schooling features was highly unequal.