For many jobs in the science, technology, engineering, and mathematics (STEM) fields, hands-on experience in research is a valuable asset, if not a requirement. This presents a unique challenge to undergraduate students who often lack the time, networking resources, and track record to obtain even entry-level positions that would provide such experience. Since 1987 the National Science Foundation (NSF) has been supporting thousands of undergraduate researchers each year through its Research Experiences for Undergraduates (REU) program.