Lack of validated research tools in Spanish-speaking countries has limited the extent to which educational research can expand. In recent years, there has been a growing interest in the exploration of affective factors in reading. The need for research on reading and reading motivation in Latin American countries calls for valid, reliable tools to…

Using Young Lives longitudinal data from Peru, this paper explores the relationship between socioeconomic status (SES) measured at the age of one, opportunities to learn (OTL) and achievement in mathematics ten years later. Four variables of OTL were measured: hours of class per year, curriculum coverage, quality of teachers' feedback, and level…