University of Extremadura

Best Global Universities Rankings by U.S. News & World Report presents all the top universities from the U.S. and 60 other countries around the world. They measure the rate of students going to their second year of studies, as well as the rate of students who graduate. It also asks university representatives on the performance of universities, and evaluates university resources, teacher salaries, graduation rates, student academic achievements and satisfaction. After calculating and comparing these criteria, U.S. News ranks the top international universities accordingly.

ARWU World University rankings is the first world university ranking. It ranks the world's top 1000 colleges and universities based on objective indicator. They look at the number of award-winning (Fields Medals and Nobel Prize) scientists who are located there, how much of their research is cited and referenced around the world, and how much they've contributed to different academic fields. After calculating and comparing these criteria, ARWU ranks the universities accordingly.

QS World University Rankings is one of the top international rankings measuring the popularity and performance of universities all over the world. They measure university reputation based on the impressions of higher education experts, companies who hire graduates, and teaching quality. QS also considers the ratio of international teachers and students present at universities, as well as the times research papers were mentioned by researchers. After calculating and comparing these criteria, QS ranks the universities accordingly.