"Summer counseling" is designed to help college-intending high school graduates complete the steps needed to enroll in college and start their college careers. These programs provide services during the months between high school graduation and college enrollment and involve outreach by college counselors or peer mentors via text messaging campaigns, email, phone, in-person meetings, instant messaging, or social media. These intervention services provide college-intending individuals with information about tasks required for college enrollment, as well as assistance in overcoming unanticipated financial, informational,and socioemotional barriers that prevent college entry. The What Works Clearinghouse (WWC) identified five studies of "summer counseling" that both fall within the scope of the Transition to College topic area and meet WWC group design standards. All five studies meet WWC group design standards without reservations, and no studies meet WWC group design standards with reservations. Together, these studies included 13,614 recent high school graduates in 10 locations. "Summer counseling" had potentially positive effects on credit accumulation and persistence and mixed effects on college access and enrollment for recent high school graduates.