We estimate the impact of district-level schooling mode (in-person versus hybrid or distance learning) on test scores …, but were significantly larger in districts with larger populations of students who are Black, Hispanic or eligible for …

setting where students are randomly assigned to a university instructor's first, second, third or fourth lesson on the same … teachers' preparation time without negative effects on students. …

on students learning efficiency. The results indicate that the main effects of the re-organization on the learning … efficiency was a decreasing importance of students' attendance and of continuous preparation of the material. …

on students learning efficiency. The results indicate that the main effects of the re-organization on the learning … efficiency was a decreasing importance of students' attendance and of continuous preparation of the material. …