GENERAL REGULATIONS AND INSTRUCTIONS / 15 Undergraduate courses numbered 300 and above are acceptable for minor credit when taken as a part of an approved graduate program. In any case, at least 50 per cent of the minimum course work for any master's degree must be in courses numbered 600 or above. Registration in the courses numbered 699, Master's Research, and 799, Doctoral Research, may be from 1 to 17 credits in one quarter. Advisers should assign the number of credits in these courses appropriate to each stu- dent's research plan. Regarding the assignment of credit for research which is a part of a student's employment, as well as a contribution to his thesis or dissertation, see the section on Residence for the Ph.D. degree. A complete list of approved graduate courses appears in the section of this Catalog entitled Fields of Instruction. Departments reserve the right to de- cide which of these graduate courses shall be given in any quarter. The pub- lished Schedule of Courses does not always include all graduate courses offered; the departments, therefore, should be consulted concerning available courses. CORRESPONDENCE AND EXTENSION WORK.-No courses may be taken for graduate credit by correspondence. No extension courses may be used for graduate credit except in programs for the M.Ag., M.Ed., M.A.E., M.H.Ed., M.P.E., and Ed.S. For regulations governing the use and limits of off-campus work on these degree programs, see the requirements for the specific degrees. Extension work taken at another institution (except through the Board of Regents Office for Continuing Education) may not be transferred to the University of Florida for graduate credit. STATE CENTERS FOR CONTINUING EDUCATION.-Course work is available in the graduate residence centers established in the state. Degree programs to which residence center work may be applied are Master of Agriculture, Master of Education, Master of Engineering, Master of Business Administra- tion, Master of Physical Education, and Master of Health Education. The amount of credit acceptable for transfer to a degree program varies according to the degree sought. For regulations governing the use of residence center work in the degree programs named, see below, under requirements for specific degrees. GRADES Passing grades for graduate students are A, B, C, and S (satisfactory). Courses with the grades of D, E, U (unsatisfactory), I (incomplete), X (absent from examination), EW (dropped for nonattendance or unsatisfactory work), or WF (withdrew failing) cannot be used to satisfy any of the re- quirements of a graduate degree. Grade points are determined by equating the grade for each quarter hour as follows: A with 4, B with 3, C with 2, D with 1, and E, I, X, EW, and WF with 0. Grade points are not designated for S and U grades. Averages are computed by dividing the total number of grade points earned by the total number of credits attempted at the University of Florida. Hours for grades of S and U and hours for ASC 641, 642, and 643 are not considered in calculating a grade point average.