Universal preschool is an international movement that uses public funding to ensure that all families get a high-quality preschool education. In the United States, there is a prevalent achievement gap. Research has shown that many children of color and students from low-income families do not get the skills they need to succeed academically due to their inaccessibility to preschool. Therefore, attending high-quality preschool students who are of lower socioeconomic status could gain five months of additional reading, and children of color could gain seven months of learning, which would close the achievement gap to about forty-one percent. This research looks at databases, texts, and fieldnotes to gather information about how effective universal preschool is in closing the achievement gap.