The National Science Foundation's EHR Core Research: Building Capacity in STEM Education Research (ECR: BCSER) program supports projects that build investigators' capacity to carry out high-quality STEM education research. The program seeks to broaden the pool of researchers who can advance knowledge regarding STEM learning and learning environments, broadening participation in STEM fields, and STEM workforce development. Some key aspects of this opportunity include: • Supporting activities that enable researchers to expand their areas of expertise and acquire the requisite knowledge and skills to conduct rigorous research in STEM education. • Career development may be accomplished through investigator-initiated professional development and research projects or through institutes that enable researchers to integrate methodological strategies with theoretical and practical issues in STEM education. • Researchers from underrepresented groups are particularly encouraged to submit proposals.