The cost of corruption is high. Stolen resources from education budgets mean overcrowded classrooms and crumbling schools, or no schools at all. Books and supplies are sometimes sold instead of being given out freely. Schools and universities also sell school places or charge unauthorised fees, forcing students (usually girls) to drop out. Teachers and lecturers are appointed through family connections, without qualifications. Grades can be bought, while teachers force students to pay for tuition outside of class. In higher education, undue government and private sector influence can skew research agendas.