With a desire to support the development of effective and equitable CS opportunities for girls, and the acknowledgement that many nonprofits lack the evaluative capacity needed to ensure high quality programming, Google and NGCP developed the Computer Science Outreach Program Evaluation Network (CS OPEN). For the 2015-2016 pilot, Google — in partnership with Haynie Research and Evaluation — provided expertise and professional development to promote evaluation of CS initiatives within the NGCP network. This summary is based on findings from the evaluation of the pilot, 2015-2016.