Since its inception in 2014, the emphasis of the DLF Assessment Interest Group (AIG) has been on developing best practices, guidelines, and tools around different aspects of digital library assessment. This past year has seen the emergence of nascent collaborations that have organically evolved from working group projects and community engagement. The AIG is at a transitional moment in which its foundational work continues to grow while also providing a platform for supporting external partnerships/initiatives. The first part of this session reviews the work that took place during 2017, with presentations from six working groups in the areas of web analytics, cost assessment, cultural assessment metadata assessment, user experience, and content reuse. The presentations is followed by a facilitated discussion on how emerging collaborations and future partnerships can positively shape digital library assessment work moving forward. Working group presentations features the following: * The Web Analytics working group continues to build, update, and expand the Annotated Resources List, first created and shared in 2016. * The Cost Assessment working group is evaluating the Digitization Cost Calculator user experience and gathering more data for the project. * The Cultural Assessment working group is collaborating with the User Experience subgroup (part of the User Studies working group), publishing the initial draft of their annotated bibliography, and developing of a cultural assessment toolkit. * The Metadata Assessment is engaged in multiple projects, including: work on a generalized framework for digital libraries descriptive metadata assessment; a clearinghouse of metadata application profiles and mappings; an expanded database of tools used for metadata assessment; and a curriculum and workshop for metadata staff to perform (primarily) descriptive metadata assessment using a common set of tools and techniques. * The Reuse subgroup (part of the User Studies working group) is sharing the work they are doing for "Developing a Framework for Measuring Reuse of Digital Objects," an IMLS National Leadership in Libraries grant funded project (LG-73-17-0002-17). Their portion of the presentation will provide an overview of grant activities and share results from a preliminary survey that seeks to understand current practices around reuse. * The User Experience subgroup (part of the User Studies working group) is developing a web resource where digital library practitioners can find best practices and resources for creating user personas. Santi Thompson, Head of Digital Research Services University Libraries University of Houston A Carnegie-designated Tier One public research university 713-743-9685 sathompson3@uh.edu<mailto:sathompson3@uh.edu> http://orcid.org/0000-0002-0337-6439