This First Look report presents basic findings about undergraduate student experiences during COVID-19 in spring 2020. These findings are based on preliminary data from the 2019-20 National Postsecondary Student Aid Study (NPSAS:20), a national survey of undergraduate and graduate students enrolled any time between July 1, 2019, and June 30, 2020, in institutions that can participate in federal financial aid programs. The findings in this report provide the first national estimates of the COVID-19 pandemic's impact on postsecondary students. Researchers have previously collected and reported data at institution, state, and international levels (Aristovnik et al. 2020; Aucejo et al. 2020; California Student Aid Commission 2020). The main purpose of NPSAS:20 is to measure how students and their families pay for postsecondary education at Title IV eligible institutions, with a focus on federal student aid given through Title IV of the Higher Education Act. NPSAS:20 student surveys started in March 2020, just as the pandemic began affecting students' educational experiences. Items about COVID-19 were added in April to collect information about these effects on students between January 1 and June 30, 2020. Because these items were based on effects seen early in the pandemic, they likely do not reflect all possible student experiences. Data used in this report are from 61,000 NPSAS undergraduate respondents who completed the survey after the COVID-19 items were added. Data from students who answered before the COVID-19 items were added are not included; however, the data for those who answered after the items were added are weighted to represent all undergraduates in the United States enrolled between January and June 2020. [For the summary, see ED613349.]