Recent movement beyond the GDP toward the more holistic view on the socio-economic outcomes promotes a culture of evidence-based decision making in order to increase the welfare of societies1 Availability of statistical indicators and their recognition by citizens can contribute to good governance. The Eurobarometer surveyed2 the level of trust the public assign to official statistics and the value the politicians assign to them. Outcomes shown a clear correlation between trust in statistics and the idea that political decisions are made on the basis of them. The results in Denmark and the Netherlands (high level of trust and use of statistics) and Eastern European countries like Slovakia, Latvia, Hungaria and Bulgaria (low level of trust and use of statistics) are in line with the PISA 2006 results achieved in the area of mathematical literacy: while students in Denmark and the Netherlands scored above the OECD average, students in the Eastern European countries: Slovakia3, Latvia, Hungaria and Bulgaria, scored below the OECD average. The possible reasons and costs of underachievement of Slovak students in PISA 2003 survey were analysed by the NIE4 and INEKO5 using released items from the overarching idea - Uncertainty. There are some related challenges in the field of education – from the low mathematical literacy achievements at the end of the schooling to the lack of expertise in data sources handling and professionals in education willingness to do so. Related task is to promote competence in use of numerical data resources in a search for the best practices in education.