The credit value of each course is given in semester units and is shown after the description of the course. One semester credit hour equals at least 15 classroom hours of lecture, or 30 hours of laboratory, or 45 hours of self-study, practicum, or internship/externship. The formula for calculating the number of semester credit hours for each course is: (Total credit units of a course) = (hours of leture/15) + (hours of lab/30) + (hours of practicum/45).