How the HYPATIA analysis tool is used as a hands-on experience to introduce HEP to high schools

HYPATIA'' is a tool for interactive analysis of data from the ATLAS experiment at the Large Hadron Collider of CERN. It has been created by the authors and has been evolving over a number of years. It is available in a dowloadable version, which is regularly used in the International Masterclasses, and an online version which now exists in the form of a webapp. Furthermore, the data from ATLAS, which are necessary for performing different educational analysis paths, are available online. Such examples of interactive analyses vary from the estimation of the magnetic field of the ATLAS solenoid magnet, to detecting \textquotedblleft pseudo\textquotedblright~ Higgs events. These applications have been used in recent years in a large number of schools in the form of a half-day mini local (or even remote) masterclass. These activities have been supported by various European Union outreach programs which give emphasis to promoting science education in schools through new methods based on the inquiry based techniques: questions, search and answers. This way we have been able to introduce cutting edge research in particle physics to High Schools, bridging the gap between research and school hands-on experience.