A head teacher (also known as school principal, headteacher, headmaster, headmistress or the head, sometimes informally in Scots, the heidie or heedie) is the most senior teacher, leader and manager of a school.

The University of Warsaw (, ), established in 1816, is the largest university in Poland. It employs over 6,000 staff including over 3,100 academic educators. It provides graduate courses for 53,000 students (on top of over 9,200 postgraduate and doctoral candidates). The University offers some 37 different fields of study, 18 faculties and over 100 specializations in Humanities, technical as well as Natural Sciences.