Collaborative Learning in Practice is a model of placement learning for student nurses that is currently being implemented in the United Kingdom, apparently originating in Amsterdam. Potential benefits are reported to be increased placement capacity, reduced burdens on mentors as practice assessors, improvements in qualified nurses' job satisfaction, recruitment and retention, and better-developed preparedness for registrant practice amongst student nurses. We conducted a thorough, rigorous systematic review between October and December 2018 of the literature on Collaborative Learning in Practice to discover whether there was a research evidence base for these claims. We found nothing published in English in peer reviewed journals. We found 14 related papers, although these were about the Dedicated Education Unit concept, and we have conducted a narrative synthesis of them. Key findings support the assertions related to Collaborative Learning in Practice, albeit in different models of placement learning. Further research is necessary with Collaborative Learning in Practice stakeholders including staff and students, and regarding patient care metrics, to demonstrate benefits or otherwise and until that research takes place potential gains remain unproven.