Liceo Scientifico Statale “Filippo Masci” is an ancient and prestigious high school established by a Royal Decree in 1923.The educational activities of the institute, which has about 650 students, are carried out in three separate buildings: the historical building, the Regional Seminary and the Chieti Scalo building. Liceo “Masci” Curriculum, which combines classical tradition with scientific culture, is divided into 3 main areas: the traditional scientific course, the Applied Science blended curriculum in Biology, Maths and Physics. Liceo “Masci” Curriculum, which combines classical tradition with scientific culture, is divided into 3 main areas: the traditional scientific course, the Applied Science blended curriculum in Biology, Maths and Physics. Moreover, the results of the INVALSI national tests are comparable to socio-cultural background. Our Teachers Professional Development Plan, in is aimed at the training and professional development of our teachers, especially compliance with the Reform Act 107/2015, contained in our School Chart (PTOF), focusing on STEM group teachers, in order to adopt a competence-based curriculum in an international perspective.