We revisit and substantially extend the evidence on the importance of instruction time for student achievement on international assessments. We first successfully replicate the estimate of a positive effect of weekly instruction time in the seminal paper by Lavy (Economic Journal, 125,...

National Teaching Standards by various educational organizations in the United States call for a decrease in the use of traditional teaching practices (such as learning by rote) and an increase in the use of modern teaching practices (such as working in small groups) in schools. Yet a small...