their average scores in all three key subject areas in the programme for international student assessment pisa fare relatively well compared with other oecd countries figure the progress in international reading literacy study pirls and the trends in international mathematics and science study timss confirm that slovenian pupils compare favourably against their peers in the participating countries with slightly higher achievement in science than in reading and mathematics trends in average science mathematics and literacy scores of fourth and eighthgrade students have been rather favourable as well with scores on timss and pirls assessments particularly in science and mathematics improving substantially