Curricular reform efforts are underway in many countries, focused on adopting inquirybased approaches to teaching and learning. Therefore, it is increasingly important to understand what outcomes students attain in inquiry environments. Derived from a literature review, a 23-item, criterion-referenced inventory is presented for theoretically implied and empirically based outcomes or benefits for students engaging in inquiry, and includes research on overlapping pedagogical topics such as discovery learning and problem-based learning. Student outcomes include knowledge and skills, intrinsic motivation, and development of expertise, among others. Supporting research is primarily available in the areas of cognitive and affective outcomes (e.g., knowledge, skills, motivation, attitudes, and creativity). This list can be used as a starting point for research or converted into professional development tools.