We estimate the effects of relative age in kindergarten using data from an experiment where children of the same age were randomly assigned to different kindergarten classmates. We exploit the resulting experimental variation in relative age in conjunction with variation in expected kindergarten entry age based on birth date to account for…

It is common practice in elementary science classrooms to have students create representations, such as drawings, as a way of exploring new content. While numerous studies suggest the benefits of representation in science, the majority focus on specific, canonical representations, such as graphs. Few offer insight or guidance regarding how…

Multiage settings are alternative educational groupings that promote complexity in young children's thinking. Grouping children across ages and grades encourages interconnectedness in social and intellectual development. This study compared the academic achievement of one group of multiage students to national norms on standardized achievement…