“This is most likely to happen if parents both want this and believe that they can get this – and deserve to get this – at school,” says Susanna Loeb, a professor of education at Stanford University in California.
Amid the flurry of activity in recent years, researchers and policy advocates are increasingly pointing to a specific kind of tutoring as the most effective. Known as “high-impact” or “high-dosage,” it generally refers to tutoring that happens at least three times a week for 30-minute sessions with groups of four or fewer students. And if it occurs during the regular school day? Even better.

