Dr. Jose M. Diego-Mantecón received his M.Phil. and Ph.D. degrees in mathematics education from Cambridge University (UK). He is currently working at the University of Cantabria (Spain), and he has experience in developing and working on international projects. He was part of the Millennium Mathematics Project (MMP) of the University of Cambridge, which was directed by the theoretical physicist and mathematician John Barrow. As part of the MMP, Jose was responsible for several years of the Spanish version of the Maths Thesaurus Project, which is a thesaurus of school and undergraduate mathematics across different languages. Jose has an extensive background in the evaluation of comparative studies as well as in the design of methodological instruments for cross-cultural studies. In his research project, he has developed a valid instrument to evaluate student mathematics-related beliefs in Mexico, Spain, Slovakia, Ireland, England, and Cyprus (Diego-Mantecón, 2013). Nowadays, Jose collaborates on TIMSS. He was the Spanish representative at a meeting of the project in Amsterdam (2012) for designing the mathematics items for TIMSS 2015. Jose led two European projects in the Spanish context: KIKS (Erasmus+) and STEMforYouth (Horizon2020). He is currently coordinating the STEAMTeach project (Erasmus+), and leading the Mathematics EduLarp project (Erasmus+) in Spain. Apart from the above, Jose Diego works in several national projects in Spain which aim to reach education.