ThEdu-14 Preface This volume contains the extended abstracts and demonstrations presented at ThEdu-14: Workshop on Theorem Proving Components for Educational Soft- ware, hosted by CICM held on July 9, 2014 in Coimbra. There were 4 submissions. Each submission was reviewed by at least 3 pro- gram committee members. The committee decided to accept all contributions. ThEdu’14 is the third edition of the ThEdu workshops. ThEdu workshops intend to gather the research communities for computer Theorem proving (TP), Automated Theorem Proving (ATP), Interactive Theorem Proving (ITP), as well as Computer Algebra Systems (CAS) and Dynamic Geometry Systems (DGS). The goal of this union is to combine and focus systems of these ar- eas to enhance existing educational software as well as studying the design of the next generation of mechanised mathematics assistants. June 30, 2014 Walther Neuper Linz Program Committee Francisco Botana University of Vigo at Pontevedra Roman Hašek University of South Bohemia Filip Maric University of Belgrade Walther Neuper Graz University of Technology Pedro Quaresma University of Coimbra Vanda Santos CISUC, Portugal Wolfgang Schreiner Research Institute for Symbolic Computation (RISC)