Many grantmakers champion the idea of using evaluation to improve grantee effectiveness or advance a field of practice. It’s a worthy endeavor, but how can you make it happen in the real world? This guide explores an increasingly popular method called “collaborative inquiry.” Grantmakers define the practice, consider potential benefits and grapple with common challenges. A mini-case study shows how collaborative inquiry was used to support growth in a new field. This white paper forms part of GrantCraft’s Evaluation Techniques: A Series of Brief Guides to help grantmakers weigh the advantages of different approaches.