This investigation is based on eight extensive empirical studies (total N = 12,294) supplemented by automated analysis of online data, to examine attitudes toward educational reforms introduced in Poland in 2017. We explore the attitudes within groups categorized as actors (people directly affected by the reform, namely students and parents) and observers (the general population). The Attitudes Toward Educational Reform Scale (ATERS) was developed and validated. ATERS psychometric properties were examined using item response theory and confirmatory factor analyses, while the differences between groups were summarized meta-analytically. Consistently with expectations, we observed that the overall attitude toward the reform was negative, and the strength of this negative attitude increased along with being more directly affected by the changes introduced by it. While the general population held a relatively neutral attitude toward the reform, the attitude was clearly negative among parents and students. We discuss reasons and consequences of these findings.