This Toolkit presents lessons learned from the process of implementing a new system for collecting student-level work-based learning (WBL) data in high school career and technical education (CTE) programs. As part of a study on career academies and WBL, a research team worked closely with a district CTE office and school staff to design and implement a new data collection system. The objective was to produce reliable, complete data that would not only support research, but also provide the district with the data it needed for program improvement and new state reporting requirements. The Toolkit outlines a step-by-step process that district and school staff can use for defining goals, identifying data elements to collect, establishing data collection protocols, and using the resulting data. It includes a section with considerations for researchers and evaluators who work with WBL data.