Look up practicum in Wiktionary, the free dictionary.
A practicum (also called work placement, especially in the UK) is a graduate level course, often in a specialized field of study, that is designed to give students supervised practical application of a previously or concurrently studied theory. Practicums (student teaching) are common for education and social work majors. In some cases, the practicum may be a part-time student teaching placement that occurs the semester before a student's full-time student teaching placement.
The process resembles an internship; however, the latter is often not part of the school program.
A practicum is involved in optional parts of schooling. Practicum is widely practiced in Asia, especially. In Pakistan it is truly mandatory and to practice it is quite necessary.