Mexico's government wants more control over the quality of teachers and who becomes a teacher. Teaching unions currently assess the quality of education in schools. The government wants to do this instead, to make sure all schools have similar standards. They want teachers to pass tests to get jobs or get promoted. The government also wants to end the policy of buying and selling teaching jobs. Some teachers in Mexico give their position to a relative when they retire or quit. The biggest teaching unions are worried that many teachers will lose their jobs. They also fear that the government wants to control every school.