This chapter focuses on the boundary work that accompanies the formation of the education system. Drawing on Michel Serres’s parasitology, it proposes that we rethink the differences of context between the household and school as interferences or perturbations of a system that undermine its normal or aspired-to operativity. The attempt to exclude such disturbance—the expulsion of the so-called parasite—should accordingly be considered the constitutive moment for the formation of the education system. On the basis of such characterization, the chapter then turns to contemporary examples of transnational and digital education that eschew the classroom in favor of new formalizations that roam far beyond the national project of mass schooling. The global scope of such education hinges on their ability to successfully reformalize education, thus dismissing the formal traits of classroom instruction.