What helps children learn difficult tasks: A teacher's presence may be worth more than a screen

What helps children learn: is it a presence of a live teacher or an interaction with the learning materials? Addressing this question, we manipulated a teacher's presence (on-screen vs. present) and activity (observing vs. doing) while teaching children about the properties of geometric shapes.Five-year-olds (n = 215) completed two shape-sorting tasks in which they distinguished between typical, atypical and non-valid shapes. In between these...