Background/Context: Impact evaluations of schooling reforms in developing countries typically focus on tests of student achievement that are designed and implemented by researchers. Are these tests any good? What practical and principled guidance should researchers in the field follow? We aim to answer these questions. Test scores have, of course,…

This study investigated longitudinal pathways leading from early spatial skills in first-grade girls to their fifth-grade analytical math reasoning abilities (N = 138). First-grade assessments included spatial skills, verbal skills, addition/subtraction skills, and frequency of choice of a decomposition or retrieval strategy on the…

Over the past year, the nation's governors and state school chiefs have achieved laudable consensus around a set of math and English standards, developed voluntarily and without federal involvement through the Common Core State Standards Initiative (CCSSI). Most states have signed on to them. More recently, the states have again teamed up--this…