*The source clarifies in-classroom instruction as instruction either in a physical classroom, or as instruction as effective as in-classroom instruction.
Citation formats
Estimated learning loss due to COVID-19, by scenario U.S. 2020
Due to the COVID-19 pandemic in 2020, many schools in the United States had to make the switch to distance learning rather than in-person classes. Because of the switch to online learning, it is estimated that if in-classroom instruction resumes by **, students will have lost about *** months of learning.
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McKinsey & Company. (June 1, 2020). Estimated learning loss due to COVID-19 in the United States in 2020, by scenario (in months) [Graph]. In ÀÖ²¥´«Ã½app×îа汾. Retrieved August 13, 2026, from /statistics/1197231/estimated-learning-loss-covid-19-scenario-us/
McKinsey & Company. "Estimated learning loss due to COVID-19 in the United States in 2020, by scenario (in months)." Chart. June 1, 2020. ÀÖ²¥´«Ã½app×îа汾. Accessed August 13, 2026. /statistics/1197231/estimated-learning-loss-covid-19-scenario-us/
McKinsey & Company. (2020). Estimated learning loss due to COVID-19 in the United States in 2020, by scenario (in months). ÀÖ²¥´«Ã½app×îа汾. ÀÖ²¥´«Ã½app×îа汾 Inc.. Accessed: August 13, 2026. /statistics/1197231/estimated-learning-loss-covid-19-scenario-us/
McKinsey & Company. "Estimated Learning Loss Due to Covid-19 in The United States in 2020, by Scenario (in Months)." ÀÖ²¥´«Ã½app×îа汾, ÀÖ²¥´«Ã½app×îа汾 Inc., 1 Jun 2020, /statistics/1197231/estimated-learning-loss-covid-19-scenario-us/
McKinsey & Company, Estimated learning loss due to COVID-19 in the United States in 2020, by scenario (in months) ÀÖ²¥´«Ã½app×îа汾, /statistics/1197231/estimated-learning-loss-covid-19-scenario-us/ (last visited August 13, 2026)
Estimated learning loss due to COVID-19 in the United States in 2020, by scenario (in months) [Graph], McKinsey & Company, June 1, 2020. [Online]. Available: /statistics/1197231/estimated-learning-loss-covid-19-scenario-us/
