fourth year of a four-year course inordinately. Also, after graduating from professional schools, students are given particular ranks. If their school course was "Law", then their rank is the Law Technician. Only four-year courses give ranks. Grading system The grading system is numeric and is present in this form through elementary school and high school. Grades from 1 (the lowest and failing grade) to 5 (the best grade) are used for primary and high schools: Insufficient (1) corresponds to American F Sufficient (2) corresponds to American D and C Good (3) corresponds to American C and B grades Very good (4) corresponds to American B+ and A− grades Excellent (5) corresponds to American A and A+ grades Higher schools and universities use grades from 5 to 10. All students have to acquire at least 6 (the lowest passing grade). Grades for the 1st grade of primary school are 'descriptive' (teacher writes down the impressions about the particular student and particular subjects). Free Textbooks Every subject (except PE) has its own textbook (students aren't obliged to have all textbooks). Textbooks are chosen by the teachers of the particular school, and they are bought in the local bookstore, or as second-hand (from those who passed the particular grade). As of school year 2009–2010, all 1st grade primary school students are granted textbooks for free, provided they return them at the end of school year "usable". However, even "unusable" (damaged) books are accepted, and no-one is fined, as minister Žarko Obradović said. Free textbooks in higher grades were only available for poor students in the past, but now students in Belgrade get their textbooks free of charge but are bound to return them at the end of the school year. Foreigners and the stateless Foreign citizens and stateless students are enrolled on the same principle as Serbian citizens are. The only difference is that they are provided free Serbian classes (in case they don't already know Serbian) prior to enrollment so they could understand lectures in school. If the student is from a European country, they can be provided the lectures of mother tongue and culture, free or with compensation. Students' health All students have to submit their medical report when proceeding to every grade with an odd number. A psychologist's report is also needed if enrolling in primary school. Compulsory vaccinations, physical examinations and dental checkups are carried out in schools for