This paper seeks to contribute to the area studies and development of the 2023 Annual Review of Comparative and International Education by doing a trend analysis on the amount of variance of student achievement explained by socio-economic differences between 2013 and 2019 using the ERCE database in Latin America and the Caribbean. It also seeks to contrast these results with the amount of variance explained by a number of teacher characteristics, which the literature has identified as effective. In doing these analyses, we seek to assess on whether the region has made any progress on reducing the impact of socioeconomic differences on student achievement and increasing the levels of teacher efficiency.