Undermatching refers to high-achieving low-income students who fail to apply to selective colleges that they are qualified for. Research shows that very few low-income high achievers apply to a range of selective colleges, and they are vastly outnumbered as applicants by high-income students with similar qualifications. This undermatching is problematic because research demonstrates that low-income students benefit significantly from attending selective colleges, experiencing better educational and career outcomes. However, low-income high achievers face barriers like isolation from other high achievers, lack of college counseling resources, and difficulty navigating the application process. Interventions shown to help address undermatching include providing students with financial information, application assistance, and support completing financial aid forms.