Evidence shows that participation in pre-K can benefit children from all backgrounds. But questions remain about what learning experiences in pre-K best support children’s learning and how long the “pre-K boost” lasts for different types of skills and for different groups of children. ELN researchers have expanded the field’s knowledge base by exploring these questions and have identified learning experiences that have the potential to support children’s academic and social-emotional skills across time. Researchers also examined policy-level factors and systems that influence pre-K access and outcomes. (author abstract)