Former Education Materials Director, Marx Arriaga, has joined the CNTE union in a protest demanding a complete overhaul of the SEP and the resignation of Mario Delgado. Arriaga also claimed the SEP attempted to alter the school calendar to accommodate the FIFA World Cup, sparking further controversy.

El exdirector de Materiales Educativos aseguró que la SEP pretendía modificar el calendario escolar para no afectar la Copa Mundial de la FIFA