Additionally, Costa Rican students are more likely than their peers in OECD countries to arrive late, skip a lesson or miss a full day of school according to self-reported data in PISA. About 39% of 15-year-old students reported having missed at least one full day of school in the two weeks prior to the PISA test, compared to just 20% in OECD countries. About 38% of students in Costa Rica are in schools where principals consider that the shortage of educational materials (e.g. textbooks, IT equipment, library' or laboratory' material) hinders a lot student learning in their school, which is one of the largest proportions among PISA participating countries (see Figure 4.2).