Home Cream Skimming and Pushout of Students Participating in a Statewide Private School Voucher Program Search EdWorkingPapers Search EdWorkingPapers by author, title, or keywords. Search 08/2022 A pervasive issue in the school choice literature is whether schools of choice cream-skim students by enrolling high-achieving, less challenging, or less costly students. Similarly, schools of choice may “pushout” low-achieving, more challenging, or more costly students.