The article contains the results of a research within the STIMEY (Science, Technology, Innovation, Mathematics, Engineering for the Young) project funded by the European Union’s Horizon-2020 research and innovation program (2016-2021). In the project, a hybrid learning environment (LE) was developed for both on-site and online learning suitable for the learning conditions in the COVID-19 era and beyond. The purpose of the research segment presented in this paper was to develop an instrument for assessment of the learner’s progress in creativity as one of the key targets of STIMEY. COVID19 has shown that creativity is also needed to allow education systems the flexibility for unexpected changes and circumstantial challenges. The article presents a definition of Science and Technology Oriented Creativity (STOC) based on the existing theories in the field, a short outline of the STOC measurement method developed, procedures, evaluation algorithms and an overview of the experimental STOC testing results. The relevance of the method developed to its purpose and suggested tentative positive influences of the STIMEY LE on learners’ creativity are discussed. Argumentations of strengths, limitations, applications of STOC testing outside the STIMEY project and the key directions of further improvements of the method developed are provided.