The aim of this study is to describe countries' responses to the COVID-19 pandemic in K-12 education, with a particular focus on mathematics education. The cases in three countries (China, The United Kingdom, and Turkey, listed alphabetically) are described and then compared with each other. The findings showed that all three of the countries had intensive measures in education, all have a tendency to move a digital education including mathematics Education. While two of the countries took measures in health and education together, the other one presented the measures in education separate from the health measures. Hence, we found that despite the varied educational measures, and whether they are together with health or not, all of the countries in this study seem to work hard to provide students with the necessary education.