Virtual charter schools, which use technology to deliver education at students’ homes, are found to have a substantial negative effect on achievement …

„Virtual charter schools, which use technology to deliver education at students’ homes, are found to have a substantial negative effect on achievement. By contrast, so-called ’no excuses‘ charter schools, which emphasize standardized tests, behavioural standards and longer instruction time, have produced outcome improvements, especially for disadvantaged groups.“
UNESCO (Hrsg.), Non-state actors in education (2021), S. 45.