This dataset contains quantitative student data acquired during the administration of a new computational thinking assessment for upper primary school (grades 3 and 4). Over 1500 students (approximately half in grade 3 and half in grade 4) participated in the data collection which took place in January 2021 in the Canon Vaud in Switzerland. The data was used to validate the psychometric properties of the instrument in the referenced article. If you use any of the resources provided in this repository, please cite the following • The Zenodo repository, DOI: 10.5281/zenodo.5865573 • The corresponding journal article • Licence : CC-BY-NC In case of inquiries, please contact laila.elhamamsy@epfl.ch The NCCR Robotics, Madrid Regional Government (project e-Madrid-CM, P2018/TCS-4307) and Structural Funds (FSE and FEDER) funded this project