Progress in International Reading Literacy Study

comparative data on how well children read by assessing students’ reading achievement

The IEA's Progress in International Reading Literacy Study (PIRLS) is an international study of reading achievement in fourth graders

Links
http://www.agenciaeducacion.cl/wp-content/uploads/2016/02/Estudio_Calidad_educativa_percepcion_actores_clave_del_sistema.pdf