The UCL Institute of Education (IOE) is the education school of University College London (UCL). It specialises in postgraduate study and research in the field of education and is one of UCL's 11 constituent faculties. Prior to merging with UCL in 2014, it was a constituent college of the University of London. The IOE is ranked first in the world for education in the QS World University Rankings, and has been so every year since 2014. The IOE is the largest education research body in the United Kingdom, with over 700 research students in the doctoral school. It also has the largest portfolio of postgraduate programmes in education in the UK, with approximately 4,000 students taking Master's programmes, and a further 1,200 students on PGCE teacher-training courses. At any one time the IOE hosts over 100 research projects funded by Research Councils, government departments and other agencies.