A challenge faced by U.S. schools in light of new standards is how to make elementary science education more robust. To help address this challenge, an expert committee will provide evidence-based guidance on effective approaches to preK-5 science and engineering instruction that supports the success of all students. The committee will evaluate the state of the evidence on learning experiences prior to school; promising instructional approaches and what is needed for implementation to include teacher professional development, curriculum, and instructional materials; and the policies and practices at all levels that constrain or facilitate efforts to enhance preK-5 science and engineering.