A number of Czech universities fell this year in Quacquarelli Symonds international rankings (QS) compiled annually since 2004. As in previous years, the largest Charles University (UK) ranked among the Czech representatives but dropped from 260th place to 266th. Also included in the top 500, the University of Chemical Technology (ICT) and the Czech Technical University (CTU), which is the only Czech research university to see an improved ranking up from 432 to 403. This year's edition rated 1,300 schools from about a hundred countries, including 15 Czech schools. The results are based on six criteria, namely reputation among representatives of other universities, reputation among employers, citations of authors, internationalization of academia, numbers of foreign students, and the average number of students per teacher. The strengths of the top-ranked Czech universities were the student-teacher ratio, the number of foreign students, and academic reputation. Weaknesses were the ratio of cited scientists and the share of foreign employees. ČTK