The second edition of "Entering Research" (ER) is a collection of customizable active-learning activities, resources, and assessment and evaluation tools for use in undergraduate and graduate research training programs and courses. Results from two design and development research studies examining the effectiveness of the second edition of the ER curriculum and a 2-day ER facilitator training workshop are reported. Pilot testing of the second edition of the curriculum at 20 sites across the country (42 unique implementations) with 78 facilitators and 565 undergraduate and graduate research trainees provides evidence that the ER activities are clear and complete and that they were effective in helping trainees gain knowledge or improve their ability to do research. Overall, research training program directors and trainees were satisfied with courses and workshops that incorporated activities from ER. Likewise, evaluation data from four ER facilitator training workshops showed that participants valued the workshop and reported significant gains in confidence in their ability to successfully develop and implement a custom ER curriculum. Together, these results provide evidence that the ER curriculum and training workshop warrant further efficacy, effectiveness, and scale-up research.